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Task Module Architecture Documentation

Overview

The Task module follows Clean Architecture principles, organizing code into distinct layers with clear separation of concerns. This architecture ensures the code is maintainable, testable, and scalable.

Layer Structure

1. Domain Layer (lib/src/task/domain/)

The innermost layer containing business logic and rules.

Components:

  • Entities (domain/entities/)

    • e.task.dart: Core business objects
    • Contains pure business logic without dependencies

  • Repository Interfaces (domain/repository/)

    • task.repository.dart: Defines abstract interfaces for data operations
    • ai_description.repository.dart: Interface for AI-related operations
    • These interfaces follow the Dependency Inversion Principle

2. Data Layer (lib/src/task/data/)

Implements the data handling and repository interfaces defined in the domain layer.

Components:

  • Models (data/internal/models/)

    • task.dart: Data models that implement domain entities
    • Handles data serialization/deserialization

  • Repositories Implementation (data/internal/repositories/)

    • task.repository.dart: Concrete implementation of domain repositories
    • ai_description.repository.dart: AI functionality implementation

  • Data Sources (data/internal/datasource/)

    • database_helper.dart: Handles local storage operations
    • Manages data persistence and external data sources

3. Presenter Layer (lib/src/task/presenter/)

Handles UI and user interactions.

Components:

  • BLoC Pattern (presenter/bloc/)

    • bloc.dart: Business Logic Component
    • event.dart: Defines user actions
    • state.dart: Manages UI state

  • Page and Widgets (presenter/page/)

    • Main page and reusable widgets
    • Components:
      • add_task.dialog.dart: Task creation dialog
      • delete_task.dialog.dart: Task deletion confirmation
      • tasks.listview.dart: Task list display
      • new_task.button.dart: Task creation button
      • tutorial_ai.dart: AI-related UI components
      • appbar_app.dart: Application header

Architecture Benefits

  1. Separation of Concerns

    • Each layer has a specific responsibility
    • Changes in one layer don't affect others directly

  2. Dependency Rule

    • Dependencies point inward
    • Domain layer has no external dependencies
    • Data and Presenter layers depend on Domain layer

  3. Testability

    • Easy to test each layer independently
    • Domain logic can be tested without UI or database

  4. Maintainability

    • Clear structure makes code easier to maintain
    • New features can be added without modifying existing code

  5. Scalability

    • New data sources can be added without changing business logic
    • UI can be modified without affecting core functionality

Module Integration

  • module.dart files in each directory handle dependency injection and module configuration
  • Clean separation between features while maintaining cohesive functionality

Best Practices Implementation

  1. Single Responsibility Principle

    • Each class and layer has a single, well-defined purpose

  2. Interface Segregation

    • Repository interfaces are specific to their use cases

  3. Dependency Inversion

    • High-level modules don't depend on low-level implementations
    • Both depend on abstractions

  4. Clean Code

    • Meaningful file and directory names
    • Logical grouping of related functionality
    • Clear separation of widgets and business logic

This architecture ensures a robust, maintainable, and scalable task management system that can easily adapt to changing requirements while maintaining code quality and testability.