LiveDataX

LiveDataX is a Dart package that brings the original LiveData and MutableLiveData classes from native Android code to Dart. This package is designed to help you implement the MVVM (Model-View-ViewModel) pattern in your Dart applications, following Google's clean architecture principles.

Features

• LiveData and MutableLiveData classes for reactive data handling.
• Repository pattern for data management.
• ViewModel class to manage UI-related data in a lifecycle-conscious way.

Getting Started

To start using LiveDataX, add it to your pubspec.yaml file:

    dependencies:
      livedatax: ^1.0.0

Then, import it into your Dart project:

    import 'package:livedatax/livedatax.dart';

Usage

Here is a basic example of how to use LiveDataX in your project:

    import 'package:livedatax/models/live_data.dart';
    import 'package:livedatax/models/mutable_live_data.dart';
    import 'package:livedatax/models/view_model.dart';
    import '../model/example_model.dart';
    import '../repo/example_repository.dart';
    
    class ExampleViewModel extends ViewModel {
      ExampleViewModel(dynamic value) : super(value);
    
      ExampleRepository _repository = ExampleRepository();
    
      final MutableLiveData<String> _liveData = MutableLiveData<String>();
      late LiveData<String> liveData = _liveData;
    
      @override
      void init() {
        var newModel = ExampleModel(100, 'Test-init');
        _repository.set(newModel);
        _liveData.setValue(newModel.value);
      }
    
      @override
      void dispose() {
        _liveData.dispose();
      }
    
      void getIntData() {
        var newModel = ExampleModel(100, 'Test-fetch');
        _repository.set(newModel);
        _liveData.postValue(newModel.value);
      }
    
      void delete() {
        var existingModel = ExampleModel(100, "Test-done");
        bool isDeleted = _repository.delete(existingModel);
        if (isDeleted) {
          _liveData.setValue('Deleted: ${existingModel.value}');
        } else {
          _liveData.setValue('Delete failed');
        }
      }
    }

    import 'package:livedatax/models/repository.dart';
    import '../model/example_model.dart';
    
    class ExampleRepository extends Repository<ExampleModel> {
      @override
      bool delete(ExampleModel data) {
        if (allData.value != null && allData.value!.containsKey(data.id)) {
          allData.value!.remove(data.id);
          return true;
        }
        return false;
      }
    
      @override
      ExampleModel? get(ExampleModel? data) {
        if (data != null && allData.value != null) {
          return allData.value![data.id];
        }
        return null;
      }
    
      @override
      void set(ExampleModel? data) {
        if (data != null && data.id > 0) {
          if (allData.value == null) {
            var newMap = <int, ExampleModel?>{};
            newMap[data.id] = data;
            allData.value = newMap;
          } else {
            allData.value![data.id] = data;
          }
        } else {
          throw UnimplementedError();
        }
      }
    
      @override
      bool update(ExampleModel data) {
        if (allData.value != null && allData.value!.containsKey(data.id)) {
          allData.value![data.id] = data;
          return true;
        }
        return false;
      }
    }

Additional Information

For more information, visit the GitHub repository to browse through the code. You can also contribute to the package, file issues, and expect responses from the package authors.

License

This project is licensed under the MIT License. See the LICENSE file for details.