[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"project-9439":3},{"id":4,"name":5,"fullName":6,"owner":7,"repo":5,"description":8,"homepage":8,"htmlUrl":8,"language":9,"languages":8,"totalLinesOfCode":8,"stars":10,"forks":11,"watchers":12,"openIssues":13,"contributorsCount":14,"subscribersCount":14,"size":14,"stars1d":14,"stars7d":15,"stars30d":16,"stars90d":14,"forks30d":14,"starsTrendScore":17,"compositeScore":18,"rankGlobal":8,"rankLanguage":8,"license":8,"archived":19,"fork":19,"defaultBranch":20,"hasWiki":21,"hasPages":19,"topics":22,"createdAt":8,"pushedAt":8,"updatedAt":23,"readmeContent":24,"aiSummary":25,"trendingCount":14,"starSnapshotCount":14,"syncStatus":17,"lastSyncTime":26,"discoverSource":27},9439,"flutter_billing_app","Dinesh-Sowndar\u002Fflutter_billing_app","Dinesh-Sowndar",null,"Dart",1257,605,15,3,0,6,108,2,21.35,false,"main",true,[],"2026-06-12 02:02:07","# 🛒 Mobile POS & Billing App \n\nA feature-rich, high-performance offline-first billing and Point of Sale (POS) application built with Flutter. Designed for seamless retail checkout operations featuring barcode scanning, thermal Bluetooth printing, and robust local data persistence.\n\n## Screenshot\n\n\nhttps:\u002F\u002Fgithub.com\u002Fuser-attachments\u002Fassets\u002Ff2d16454-5408-43b3-b207-cd843bbc2c9e\n\n\n\n## 🎯 Project Scope\n\nThis application serves as a complete offline POS system for small to medium-sized retail shops. It streamlines the checkout process, catalog management, and receipt generation securely entirely on-device.\n\n### Core Features:\n- **Product Management System**: Complete CRUD operations for inventory items with barcode\u002FQR code support.\n- **Smart Checkout System**: Rapid cart building via camera-based barcode scanning or manual entry, and robust order calculation functionality.\n- **Bluetooth Thermal Printing**: Direct integration with thermal printers (`print_bluetooth_thermal`) to instantly output physical receipts.\n- **Shop Settings & Customization**: Centrally managed shop details printed dynamically on receipts.\n- **Offline-First Architecture**: Powered by `Hive` for lightning-fast localized NoSQL data storage. No active internet connectivity required.\n\n## 🛠 Tech Stack & Architecture\n\nBuilt leveraging industry-standard architectural principles (Clean Architecture & Feature-Driven Design) ensuring scalability, separation of concerns, and robust testability. \n\n- **Framework**: [Flutter](https:\u002F\u002Fflutter.dev\u002F) (SDK >=3.1.0)\n- **State Management**: `flutter_bloc`\n- **Dependency Injection**: `get_it`\n- **Routing**: `go_router`\n- **Local Database**: `hive` & `hive_flutter`\n- **Data Modeling**: `json_serializable`, `equatable`\n- **Functional Programming**: `fpdart`\n- **Hardware Integrations**: `mobile_scanner` (barcodes), `print_bluetooth_thermal`\n\n## 📁 File Structure\n\nThe codebase is organized using a **Feature-First Clean Architecture** utilizing domain-driven concepts.\n\n```text\nlib\u002F\n├── core\u002F                       # Core application utilities and shared components\n│   ├── data\u002F                   # Global data sources (e.g., Hive initialization)\n│   ├── error\u002F                  # Standardized Failure\u002FException models (fpdart compatible)\n│   ├── theme\u002F                  # UI aesthetics, typography, styling\n│   ├── usecase\u002F                # Base UseCase contracts\n│   ├── utils\u002F                  # Helpers (e.g., PrinterHelper, formatters)\n│   ├── widgets\u002F                # Reusable global UI widgets (AppBars, generic buttons)\n│   └── service_locator.dart    # get_it dependency injection setup\n│\n└── features\u002F                   # Independent feature modules\n    ├── billing\u002F                # Core POS operations: Cart, Checkout, Invoice Generation\n    ├── product\u002F                # Inventory management: Adding, Listing, Scanning products\n    ├── settings\u002F               # App configuration: Printer connections, App settings\n    └── shop\u002F                   # Shop details configuration\n```\n\n*Note: Each feature is further subdivided internally into Clean Architecture layers: `data`, `domain`, and `presentation`.*\n\n## 💡 Use Cases\n\n- **Rapid Billing Entry**: A cashier launches the app, navigates to the checkout page, and uses the device camera to instantly scan product barcodes. The products are added to the cart, the total is calculated including taxes, and a receipt is finalized.\n- **Physical Receipt Generation**: After checkout confirmation, the app triggers a connected external Bluetooth thermal POS printer to instantly print an itemized paper receipt with the shop’s header.\n- **Inventory Sideloading**: A manager opens the Product feature to add new stock to the local database, taking a picture of the barcode to bind the SKU for future lightning-fast checkouts.\n- **No-Connection Operation**: The business operates a stall at an exhibition with poor networking. The app functions entirely via its embedded Hive local database and Bluetooth, completely undisturbed by network drops.\n\n## 🚀 Getting Started\n\n### Prerequisites\n- Flutter SDK `^3.1.0` or higher\n- Android Studio \u002F Xcode for emulators and building.\n- *Optional*: A physical Android\u002FiOS device and a Bluetooth Thermal Printer for testing hardware integrations natively.\n\n### Installation\n\n1. Clone the repository and navigate to the project directory:\n   ```bash\n   git clone \u003Crepository_url>\n   cd billing_app\n   ```\n\n2. Fetch dependencies:\n   ```bash\n   flutter pub get\n   ```\n\n3. Run code generation (required for Hive adapters and JSON serialization):\n   ```bash\n   dart run build_runner build --delete-conflicting-outputs\n   ```\n\n4. Run the project:\n   ```bash\n   flutter run\n   ```\n\n## 🤝 Contributing Guidelines\nAs a senior-focused project, please adhere to:\n1. **Clean Architecture Rules**: Maintain strict boundaries between `domain`, `data`, and `presentation` layers.\n2. **Immutable States**: Emit only immutable states from BLoCs utilizing `equatable`.\n3. **No Direct Exceptions in Domain**: Utilize `fpdart`'s `Either\u003CFailure, Type>` pattern to handle control flow for exceptions.\n","这是一个使用Flutter构建的高性能离线优先的移动POS和计费应用程序，专为零售结账操作设计。核心功能包括产品管理系统、智能结账系统、蓝牙热敏打印以及店铺设置与定制化等。该应用支持条形码\u002F二维码扫描、手动输入快速构建购物车，并通过`Hive`实现本地数据持久化存储，无需互联网连接即可运行。技术上采用Clean Architecture和Feature-Driven Design原则，结合`flutter_bloc`进行状态管理，`get_it`依赖注入，`go_router`路由管理，`hive`及`hive_flutter`本地数据库，`json_serializable`和`equatable`进行数据建模，`fpdart`函数式编程，以及`mobile_scanner`和`print_bluetooth_thermal`硬件集成。适用于中小型零售商店需要高效、可靠的离线POS解决方案的场景。","2026-06-11 03:22:40","top_language"]