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worker/CLAUDE.md
Phuoc Nguyen 57bf73e4d1 update
2025-10-17 17:49:01 +07:00

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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:

final authProvider = AsyncNotifierProvider<AuthNotifier, AuthState>
final otpTimerProvider = StateNotifierProvider<OTPTimerNotifier, int>

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:

final memberCardProvider = Provider<MemberCard>((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:

final loyaltyPointsProvider = AsyncNotifierProvider<LoyaltyPointsNotifier, LoyaltyPoints>

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:

final referralProvider = AsyncNotifierProvider<ReferralNotifier, Referral>

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:

final productsProvider = AsyncNotifierProvider<ProductsNotifier, List<Product>>
final productSearchProvider = StateProvider<String>
final selectedCategoryProvider = StateProvider<String?>

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:

final cartProvider = NotifierProvider<CartNotifier, List<CartItem>>
final cartTotalProvider = Provider<double>

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:

final ordersProvider = AsyncNotifierProvider<OrdersNotifier, List<Order>>
final orderFilterProvider = StateProvider<OrderStatus?>
final paymentsProvider = AsyncNotifierProvider<PaymentsNotifier, List<Payment>>

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:

final projectsProvider = AsyncNotifierProvider<ProjectsNotifier, List<Project>>
final projectFormProvider = StateNotifierProvider<ProjectFormNotifier, ProjectFormState>

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:

final chatProvider = AsyncNotifierProvider<ChatNotifier, ChatRoom>
final messagesProvider = StreamProvider<List<Message>>
final typingIndicatorProvider = StateProvider<bool>

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

// 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

// 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

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

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

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

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

@riverpod
class Auth extends _$Auth {
  @override
  Future<AuthState> build() async {
    final token = await _getStoredToken();
    if (token != null) {
      final user = await _getUserFromToken(token);
      return AuthState.authenticated(user);
    }
    return const AuthState.unauthenticated();
  }

  Future<void> loginWithPhone(String phone) async {
    state = const AsyncValue.loading();
    state = await AsyncValue.guard(() async {
      await ref.read(authRepositoryProvider).requestOTP(phone);
      return AuthState.otpSent(phone);
    });
  }

  Future<void> 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

@riverpod
class Cart extends _$Cart {
  @override
  List<CartItem> 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

@riverpod
class LoyaltyPoints extends _$LoyaltyPoints {
  @override
  Future<LoyaltyPointsData> build() async {
    return await ref.read(loyaltyRepositoryProvider).getLoyaltyPoints();
  }

  Future<void> refresh() async {
    state = const AsyncValue.loading();
    state = await AsyncValue.guard(() async {
      return await ref.read(loyaltyRepositoryProvider).getLoyaltyPoints();
    });
  }

  Future<void> 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

@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

@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<String> images;

  @HiveField(7)
  final String categoryId;

  @HiveField(8)
  final int stock;

  @HiveField(9)
  final bool isAvailable;

  @HiveField(10)
  final DateTime createdAt;
}

Cart Item Model

@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

@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<OrderItemModel> 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

@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

@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

// 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

// 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<ProductCard> createState() => _ProductCardState();
}

class _ProductCardState extends State<ProductCard>
    with AutomaticKeepAliveClientMixin {
  @override
  bool get wantKeepAlive => true;

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Card(...);
  }
}

State Optimization

// 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> 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

@riverpod
class DataSync extends _$DataSync {
  @override
  Future<SyncStatus> build() async {
    // Listen to connectivity changes
    ref.listen(connectivityProvider, (previous, next) {
      if (next == ConnectivityStatus.connected) {
        syncData();
      }
    });

    return SyncStatus.idle;
  }

  Future<void> 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<void> _syncUserData() async {
    final user = await ref.read(authRepositoryProvider).getCurrentUser();
    await ref.read(authLocalDataSourceProvider).saveUser(user);
  }

  Future<void> _syncProducts() async {
    final products = await ref.read(productRepositoryProvider).getAllProducts();
    await ref.read(productLocalDataSourceProvider).saveProducts(products);
  }

  // ... other sync methods
}

Offline Queue

// Queue failed requests for retry when online
class OfflineQueue {
  final HiveInterface hive;
  late Box<Map> _queueBox;

  Future<void> init() async {
    _queueBox = await hive.openBox('offline_queue');
  }

  Future<void> addToQueue(ApiRequest request) async {
    await _queueBox.add({
      'endpoint': request.endpoint,
      'method': request.method,
      'body': request.body,
      'timestamp': DateTime.now().toIso8601String(),
    });
  }

  Future<void> 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

class ApiClient {
  Future<T> request<T>(String endpoint, {Map<String, dynamic>? data}) async {
    try {
      final response = await dio.post(endpoint, data: data);
      return _parseResponse<T>(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

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

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

// 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

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

// 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

# 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!