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fullenifulleni
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feat: implement edit source bloc
- Manages state of single source editing - Fetches source and countries data - Handles form input changes - Submits updated source data
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‎lib/content_management/bloc/edit_source/edit_source_bloc.dart

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import 'package:bloc/bloc.dart';
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import 'package:equatable/equatable.dart';
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import 'package:flutter/foundation.dart';
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import 'package:ht_dashboard/l10n/app_localizations.dart';
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import 'package:ht_data_repository/ht_data_repository.dart';
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import 'package:ht_http_client/ht_http_client.dart';
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import 'package:ht_shared/ht_shared.dart';
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import 'package:ht_dashboard/l10n/l10n.dart';
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part 'edit_source_event.dart';
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part 'edit_source_state.dart';
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/// A BLoC to manage the state of editing a single source.
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class EditSourceBloc extends Bloc<EditSourceEvent, EditSourceState> {
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/// {@macro edit_source_bloc}
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EditSourceBloc({
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required HtDataRepository<Source> sourcesRepository,
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required HtDataRepository<Country> countriesRepository,
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required String sourceId,
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}) : _sourcesRepository = sourcesRepository,
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_countriesRepository = countriesRepository,
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_sourceId = sourceId,
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super(const EditSourceState()) {
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on<EditSourceLoaded>(_onLoaded);
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on<EditSourceNameChanged>(_onNameChanged);
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on<EditSourceDescriptionChanged>(_onDescriptionChanged);
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on<EditSourceUrlChanged>(_onUrlChanged);
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on<EditSourceTypeChanged>(_onSourceTypeChanged);
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on<EditSourceLanguageChanged>(_onLanguageChanged);
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on<EditSourceHeadquartersChanged>(_onHeadquartersChanged);
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on<EditSourceSubmitted>(_onSubmitted);
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}
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final HtDataRepository<Source> _sourcesRepository;
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final HtDataRepository<Country> _countriesRepository;
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final String _sourceId;
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Future<void> _onLoaded(
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EditSourceLoaded event,
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Emitter<EditSourceState> emit,
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) async {
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emit(state.copyWith(status: EditSourceStatus.loading));
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try {
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final [sourceResponse, countriesResponse] = await Future.wait([
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_sourcesRepository.read(id: _sourceId),
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_countriesRepository.readAll(),
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]);
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final source = sourceResponse as Source;
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final countries = (countriesResponse as PaginatedResponse<Country>).items;
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emit(
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state.copyWith(
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status: EditSourceStatus.initial,
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initialSource: source,
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name: source.name,
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description: source.description ?? '',
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url: source.url ?? '',
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sourceType: () => source.sourceType,
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language: source.language ?? '',
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headquarters: () => source.headquarters,
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countries: countries,
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),
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);
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} on HtHttpException catch (e) {
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emit(
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state.copyWith(
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status: EditSourceStatus.failure,
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errorMessage: e.message,
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),
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);
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} catch (e) {
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emit(
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state.copyWith(
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status: EditSourceStatus.failure,
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errorMessage: e.toString(),
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),
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);
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}
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}
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void _onNameChanged(
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EditSourceNameChanged event,
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Emitter<EditSourceState> emit,
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) {
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emit(state.copyWith(name: event.name, status: EditSourceStatus.initial));
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}
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void _onDescriptionChanged(
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EditSourceDescriptionChanged event,
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Emitter<EditSourceState> emit,
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) {
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emit(
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state.copyWith(
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description: event.description,
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status: EditSourceStatus.initial,
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),
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);
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}
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void _onUrlChanged(
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EditSourceUrlChanged event,
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Emitter<EditSourceState> emit,
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) {
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emit(state.copyWith(url: event.url, status: EditSourceStatus.initial));
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}
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void _onSourceTypeChanged(
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EditSourceTypeChanged event,
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Emitter<EditSourceState> emit,
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) {
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emit(
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state.copyWith(
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sourceType: () => event.sourceType,
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status: EditSourceStatus.initial,
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),
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);
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}
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void _onLanguageChanged(
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EditSourceLanguageChanged event,
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Emitter<EditSourceState> emit,
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) {
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emit(
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state.copyWith(
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language: event.language,
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status: EditSourceStatus.initial,
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),
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);
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}
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void _onHeadquartersChanged(
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EditSourceHeadquartersChanged event,
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Emitter<EditSourceState> emit,
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) {
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emit(
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state.copyWith(
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headquarters: () => event.headquarters,
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status: EditSourceStatus.initial,
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),
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);
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}
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Future<void> _onSubmitted(
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EditSourceSubmitted event,
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Emitter<EditSourceState> emit,
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) async {
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if (!state.isFormValid) return;
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final initialSource = state.initialSource;
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if (initialSource == null) {
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emit(
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state.copyWith(
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status: EditSourceStatus.failure,
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errorMessage: 'Cannot update: Original source data not loaded.',
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),
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);
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return;
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}
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emit(state.copyWith(status: EditSourceStatus.submitting));
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try {
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final updatedSource = initialSource.copyWith(
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name: state.name,
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description: state.description.isNotEmpty ? state.description : null,
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url: state.url.isNotEmpty ? state.url : null,
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sourceType: state.sourceType,
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language: state.language.isNotEmpty ? state.language : null,
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headquarters: state.headquarters,
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);
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await _sourcesRepository.update(id: _sourceId, item: updatedSource);
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emit(state.copyWith(status: EditSourceStatus.success));
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} on HtHttpException catch (e) {
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emit(
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state.copyWith(
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status: EditSourceStatus.failure,
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errorMessage: e.message,
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),
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);
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} catch (e) {
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emit(
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state.copyWith(
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status: EditSourceStatus.failure,
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errorMessage: e.toString(),
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),
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);
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}
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}
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}
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/// Adds localization support to the [SourceType] enum.
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extension SourceTypeL10n on SourceType {
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/// Returns the localized name for the source type.
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///
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/// This requires an [AppLocalizations] instance, which is typically
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/// retrieved from the build context.
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String localizedName(AppLocalizations l10n) {
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switch (this) {
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case SourceType.newsAgency:
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return l10n.sourceTypeNewsAgency;
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case SourceType.localNewsOutlet:
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return l10n.sourceTypeLocalNewsOutlet;
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case SourceType.nationalNewsOutlet:
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return l10n.sourceTypeNationalNewsOutlet;
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case SourceType.internationalNewsOutlet:
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return l10n.sourceTypeInternationalNewsOutlet;
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case SourceType.specializedPublisher:
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return l10n.sourceTypeSpecializedPublisher;
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case SourceType.blog:
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return l10n.sourceTypeBlog;
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case SourceType.governmentSource:
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return l10n.sourceTypeGovernmentSource;
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case SourceType.aggregator:
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return l10n.sourceTypeAggregator;
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case SourceType.other:
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return l10n.sourceTypeOther;
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}
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}
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}

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