112 lines
3.1 KiB
Dart
112 lines
3.1 KiB
Dart
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import 'package:flutter_bloc/flutter_bloc.dart';
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import '../Repositories/articles_repository.dart';
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import '../model/article_model.dart';
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import '../model/data_output.dart';
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abstract class FetchArticlesState {}
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class FetchArticlesInitial extends FetchArticlesState {}
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class FetchArticlesInProgress extends FetchArticlesState {}
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class FetchArticlesSuccess extends FetchArticlesState {
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final bool isLoadingMore;
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final bool loadingMoreError;
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final List<ArticleModel> articlemodel;
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final int offset;
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final int total;
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FetchArticlesSuccess({
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required this.isLoadingMore,
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required this.loadingMoreError,
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required this.articlemodel,
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required this.offset,
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required this.total,
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});
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FetchArticlesSuccess copyWith({
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bool? isLoadingMore,
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bool? loadingMoreError,
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List<ArticleModel>? articlemodel,
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int? offset,
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int? total,
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}) {
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return FetchArticlesSuccess(
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isLoadingMore: isLoadingMore ?? this.isLoadingMore,
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loadingMoreError: loadingMoreError ?? this.loadingMoreError,
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articlemodel: articlemodel ?? this.articlemodel,
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offset: offset ?? this.offset,
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total: total ?? this.total,
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);
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}
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}
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class FetchArticlesFailure extends FetchArticlesState {
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final dynamic errorMessage;
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FetchArticlesFailure(this.errorMessage);
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}
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class FetchArticlesCubit extends Cubit<FetchArticlesState> {
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FetchArticlesCubit() : super(FetchArticlesInitial());
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final ArticlesRepository _articleRepository = ArticlesRepository();
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Future<void> fetchArticles() async {
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try {
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emit(FetchArticlesInProgress());
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DataOutput<ArticleModel> result =
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await _articleRepository.fetchArticles(offset: 0);
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emit(
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FetchArticlesSuccess(
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isLoadingMore: false,
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loadingMoreError: false,
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articlemodel: result.modelList,
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offset: 0,
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total: result.total),
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);
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} catch (e) {
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emit(FetchArticlesFailure(e));
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}
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}
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Future<void> fetchArticlesMore() async {
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try {
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if (state is FetchArticlesSuccess) {
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if ((state as FetchArticlesSuccess).isLoadingMore) {
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return;
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}
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emit((state as FetchArticlesSuccess).copyWith(isLoadingMore: true));
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DataOutput<ArticleModel> result =
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await _articleRepository.fetchArticles(
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offset: (state as FetchArticlesSuccess).articlemodel.length,
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);
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FetchArticlesSuccess articlemodelState =
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(state as FetchArticlesSuccess);
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articlemodelState.articlemodel.addAll(result.modelList);
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emit(FetchArticlesSuccess(
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isLoadingMore: false,
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loadingMoreError: false,
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articlemodel: articlemodelState.articlemodel,
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offset: (state as FetchArticlesSuccess).articlemodel.length,
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total: result.total));
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}
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} catch (e) {
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emit((state as FetchArticlesSuccess)
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.copyWith(isLoadingMore: false, loadingMoreError: true));
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}
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}
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bool hasMoreData() {
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if (state is FetchArticlesSuccess) {
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return (state as FetchArticlesSuccess).articlemodel.length <
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(state as FetchArticlesSuccess).total;
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}
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return false;
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}
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}
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