Data Repository

A generic repository that serves as a crucial abstraction layer within the Flutter News App Full Source Code Toolkit.

This data_repository package serves as a crucial abstraction layer within the Flutter News App Full Source Code Toolkit. It provides a generic, type-safe interface for interacting with data sources, decoupling business logic from the underlying data client implementations. By mirroring the data access methods of a DataClient, it ensures consistency and simplifies data operations across the Flutter mobile app, web dashboard, and Dart Frog backend API.

⭐ Feature Showcase: Robust Data Access & Management

This package offers a comprehensive set of features for managing data entities.

🧱 Core Functionality

🚀 Generic Data Operations

• DataRepository<T>: A generic class that provides a consistent interface for CRUD (Create, Read, Update, Delete) operations, querying, counting, and aggregation for any data type T.
• Abstraction over DataClient: Hides the complexities of DataClient implementations and SuccessApiResponse structures, offering a clean, business-logic-focused API.

🔐 User Scoping & Permissions

• Optional userId Parameter: All data access methods support an optional userId parameter, enabling seamless management of both user-specific and global resources.

🔍 Advanced Querying

• readAll Method: A powerful method that returns a Future<PaginatedResponse<T>>, supporting rich filtering, multi-field sorting, and cursor-based pagination, compatible with modern NoSQL database capabilities.
• count and aggregate: Efficient methods for counting documents and executing complex data aggregation pipelines directly on the data source.

🔄 Reactive Updates

• entityUpdated Stream: A broadcast stream that emits the Type of a data entity whenever a Create, Update, or Delete operation is successfully completed. This allows other parts of the application to react to data changes in real-time, facilitating dynamic UI updates and side effects.

🛡️ Robust Error Handling

• Exception Propagation: Catches and re-throws standardized exceptions (like HttpException subtypes or FormatException) from the underlying data client layer. This ensures predictable error handling and allows higher layers (e.g., BLoCs, API route handlers) to implement specific error recovery logic.

💉 Dependency Injection Ready

• Constructor Injection: Designed to receive an DataClient<T> instance via its constructor, promoting loose coupling and testability.

💡 Your Advantage: You get a meticulously designed, production-quality data access layer that simplifies interactions with your data sources, ensures consistency, and provides robust error handling and reactive capabilities. This package accelerates development by providing a solid foundation for data management.

🔑 Licensing

This data_repository package is an integral part of the Flutter News App Full Source Code Toolkit. For comprehensive details regarding licensing, including trial and commercial options for the entire toolkit, please refer to the main toolkit organization page.