now_in_dart_flutter

This app serves the purpose of staying up-to-date with the latest changes across Dart and Flutter ecosystem. The way this app works is by fetching markdowns from Dart and Flutter's official Github repo via REST API and rendering the information in a WebView widget.

Features

• Display Dart CHANGELOG
• Display Flutter What's New
• Display Flutter Release Notes
• Offline Support

Application Demo

Architecture

The app follows a simple but effective architecture. It relies on a feature-driven architecture with some sub-features.

Inside lib/features/ directory, you can find two sub-features: detail and home.

The home sub-feature is responsible for showing a scaffold with a bottom navigation bar. It also contains logic for maintaining bottom navigation bar's state.

The detail feature is divided into two sub-features: dart_detail and flutter_detail. Each of these sub-features has similar structure and is divided into three layers.

• Application Layer: Contains state management logic and acts as a mediator between the presentation and the data layer.
• Data Layer: Responsible for making all the necessary API calls and local cache operations.
• Presentation Layer: Associated with the UI

To check the fpdart implementation, consider taking a look at the data layer of each of the sub-features.

State Management

The project uses flutter_bloc for managing the app's state.

Storage

The app stores fetched data locally on user's device for offline support. The project uses the latest isar plugin for local storage.

Test

The unit test has been written based on the fpdart refactoring and can be found in the test directory.

• detail_local_service_test.dart
• detail_remote_service_test.dart

Dependencies

The project makes use of few third-party packages for rapid development. Some of them are listed below:

• dio (To perform network calls)
• equatable (To achieve value equality)
• flash (To display customizable toast)
• flutter_bloc (State Management)
• fpdart (Functional Programming)
• isar (Local Storage)
• url_launcher (To display information from hyperlinks in a browser interface within the app)
• webview_flutter (To display markdowns)
• mocktail (As a mocking library)

Types used from fpdart

• TaskEither: Used instead of Future to make async request that may fail
• IOEither: Used to represent a synchronous computation that may fail
• Do Notation: Used to write functional code that looks like normal imperative code and to avoid methods chaining