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thebedcoderthebedcoder
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Added feature manager with unit tests
1 parent 052bc4a commit 4429a2d

15 files changed

+1686
-55
lines changed

‎lib/feature_manager.dart

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library feature_manager;
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/// A Calculator.
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class Calculator {
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/// Returns [value] plus 1.
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int addOne(int value) => value + 1;
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}
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export 'src/domain/models/feature.dart';
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export 'src/presentation/features_screen.dart';
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export 'src/utils/feature_manager.dart';

‎lib/src/bloc/features_cubit.dart

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import 'dart:async';
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import 'package:feature_manager/src/data/feature_repository.dart';
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import 'package:feature_manager/src/domain/models/feature.dart';
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import 'package:flutter_bloc/flutter_bloc.dart';
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part 'features_state.dart';
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class FeaturesCubit extends Cubit<FeaturesState> {
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FeaturesCubit(this.repository) : super(FeaturesInitial());
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final FeatureRepository repository;
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StreamSubscription<List<Feature>>? _featuresSubscription;
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Future<void> getFeatures() async {
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try {
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emit(FeaturesLoading());
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_listenFeatures();
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} catch (e) {
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print('FeatureManager error >> $e');
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emit(FeaturesError());
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}
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}
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Future<void> changeFeature(
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Feature feature,
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Object? value,
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) async {
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try {
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await repository.putValue(feature, value);
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} catch (e) {
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print('FeatureManager error >> $e');
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emit(FeaturesError());
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}
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}
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void _listenFeatures() {
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_featuresSubscription ??= repository.getFeaturesStream().distinct().listen(
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(List<Feature> features) {
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if (features.isNotEmpty) {
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emit(FeaturesSuccess(features));
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} else {
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emit(FeaturesEmpty());
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}
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},
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onError: (e) {
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print('FeatureManager error >> $e');
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emit(FeaturesError());
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},
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);
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}
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@override
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Future<void> close() {
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_featuresSubscription?.cancel();
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_featuresSubscription = null;
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return super.close();
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}
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}

‎lib/src/bloc/features_state.dart

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part of 'features_cubit.dart';
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abstract class FeaturesState {}
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class FeaturesInitial extends FeaturesState {}
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class FeaturesSuccess extends FeaturesState {
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FeaturesSuccess(this.features);
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final List<Feature> features;
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}
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class FeaturesLoading extends FeaturesState {}
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class FeaturesEmpty extends FeaturesState {}
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class FeaturesError extends FeaturesState {}

‎lib/src/data/feature_repository.dart

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import 'dart:async';
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import 'package:feature_manager/src/domain/models/feature.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class FeatureRepository {
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FeatureRepository(this.featuresList) {
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_featuresStreamController = StreamController<List<Feature>>.broadcast();
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}
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final List<Feature> featuresList;
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late StreamController<List<Feature>> _featuresStreamController;
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Stream<List<Feature>> getFeaturesStream() => _featuresStreamController.stream;
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Future<List<Feature>> getFeatures() async {
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final List<Feature> updatedFeatures = [];
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final SharedPreferences sharedPreferences =
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await SharedPreferences.getInstance();
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for (final Feature feature in featuresList) {
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updatedFeatures.add(
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feature.copyWith(
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value: _getValue(sharedPreferences, feature),
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),
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);
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}
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_featuresStreamController.add(updatedFeatures);
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return updatedFeatures;
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}
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Future<void> putValue(
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Feature feature,
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Object? value,
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) async {
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final SharedPreferences sharedPreferences =
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await SharedPreferences.getInstance();
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switch (feature.valueType) {
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case FeatureValueType.toggle:
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await sharedPreferences.setBool(feature.key, value as bool);
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break;
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case FeatureValueType.doubleNumber:
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await sharedPreferences.setDouble(feature.key, value as double);
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break;
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case FeatureValueType.integerNumber:
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await sharedPreferences.setInt(feature.key, value as int);
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break;
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case FeatureValueType.text:
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await sharedPreferences.setString(feature.key, value as String);
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break;
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}
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getFeatures();
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}
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Object? _getValue(SharedPreferences sharedPreferences, Feature feature) =>
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sharedPreferences.get(feature.key) ?? feature.defaultValue;
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}

‎lib/src/domain/models/feature.dart

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class Feature {
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const Feature({
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required this.key,
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required this.type,
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required this.valueType,
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required this.title,
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this.remoteKey = '',
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this.description = '',
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this.remoteSourceKey = '',
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this.value,
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this.defaultValue,
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});
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final String key;
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final FeatureType type;
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final FeatureValueType valueType;
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final String title;
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final String remoteKey;
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final String description;
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final String remoteSourceKey;
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final Object? value;
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final Object? defaultValue;
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Feature copyWith({
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String? key,
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FeatureType? type,
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FeatureValueType? valueType,
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String? remoteKey,
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String? title,
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String? description,
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String? remoteSourceKey,
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Object? value,
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Object? defaultValue,
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}) {
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return Feature(
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key: key ?? this.key,
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type: type ?? this.type,
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valueType: valueType ?? this.valueType,
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remoteKey: remoteKey ?? this.remoteKey,
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title: title ?? this.title,
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description: description ?? this.description,
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remoteSourceKey: remoteSourceKey ?? this.remoteSourceKey,
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value: value ?? this.value,
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defaultValue: defaultValue ?? this.defaultValue,
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);
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}
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@override
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bool operator ==(Object other) =>
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identical(this, other) ||
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other is Feature &&
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runtimeType == other.runtimeType &&
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key == other.key &&
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type == other.type &&
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valueType == other.valueType &&
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remoteKey == other.remoteKey &&
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title == other.title &&
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description == other.description &&
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remoteSourceKey == other.remoteSourceKey &&
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value == other.value &&
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defaultValue == other.defaultValue;
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@override
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int get hashCode =>
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key.hashCode ^
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type.hashCode ^
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valueType.hashCode ^
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remoteKey.hashCode ^
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title.hashCode ^
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description.hashCode ^
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remoteSourceKey.hashCode ^
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value.hashCode ^
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defaultValue.hashCode;
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@override
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String toString() {
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return 'Feature{key: $key, type: $type, valueType: $valueType, remoteKey: $remoteKey, title: $title, description: $description, remoteSourceKey: $remoteSourceKey, value: $value, defaultValue: $defaultValue}';
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}
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}
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enum FeatureType { feature, experiment }
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enum FeatureValueType { text, toggle, doubleNumber, integerNumber }

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