elCaribe app - customization and branding

news-app/lib/cubits/generalNewsCubit.dart

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+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:news/data/models/NewsModel.dart';
+import 'package:news/utils/api.dart';
+import 'package:news/utils/strings.dart';
+
+abstract class GeneralNewsState {}
+
+class GeneralNewsInitial extends GeneralNewsState {}
+
+class GeneralNewsFetchInProgress extends GeneralNewsState {}
+
+class GeneralNewsFetchSuccess extends GeneralNewsState {
+  final List<NewsModel> generalNews;
+  final int totalCount;
+  final bool hasMoreFetchError;
+  final bool hasMore;
+
+  GeneralNewsFetchSuccess({required this.totalCount, required this.hasMoreFetchError, required this.hasMore, required this.generalNews});
+}
+
+class GeneralNewsFetchFailure extends GeneralNewsState {
+  final String errorMessage;
+
+  GeneralNewsFetchFailure(this.errorMessage);
+}
+
+class GeneralNewsCubit extends Cubit<GeneralNewsState> {
+  GeneralNewsCubit() : super(GeneralNewsInitial());
+
+  Future<dynamic> getGeneralNews({required String langId, String? latitude, String? longitude, int? offset, String? newsSlug}) async {
+    emit(GeneralNewsInitial());
+    try {
+      final body = {LANGUAGE_ID: langId, LIMIT: 20};
+
+      if (latitude != null && latitude != "null") body[LATITUDE] = latitude;
+      if (longitude != null && longitude != "null") body[LONGITUDE] = longitude;
+      if (offset != null) body[OFFSET] = offset;
+      if (newsSlug != null && newsSlug != "null" && newsSlug.trim().isNotEmpty) body[SLUG] = newsSlug; // used in case of native link , details screen redirection
+
+      final result = await Api.sendApiRequest(body: body, url: Api.getNewsApi);
+      if (!result[ERROR]) {
+        emit(GeneralNewsFetchSuccess(
+            generalNews: (result[DATA] as List).map((e) => NewsModel.fromJson(e)).toList(), totalCount: result[TOTAL], hasMoreFetchError: false, hasMore: result[DATA].length < result[TOTAL]));
+      } else {
+        emit(GeneralNewsFetchFailure(result[MESSAGE]));
+      }
+      return result;
+    } catch (e) {
+      throw ApiMessageAndCodeException(errorMessage: e.toString());
+    }
+  }
+
+  bool hasMoreGeneralNews() {
+    return (state is GeneralNewsFetchSuccess) ? (state as GeneralNewsFetchSuccess).hasMore : false;
+  }
+
+  void getMoreGeneralNews({required String langId, String? latitude, String? longitude}) async {
+    if (state is GeneralNewsFetchSuccess) {
+      try {
+        final result = await getGeneralNews(langId: langId, latitude: latitude, longitude: longitude, offset: (state as GeneralNewsFetchSuccess).generalNews.length);
+        if (!result[ERROR]) {
+          List<NewsModel> updatedResults = (state as GeneralNewsFetchSuccess).generalNews;
+          updatedResults.addAll((result[DATA] as List).map((e) => NewsModel.fromJson(e)).toList());
+          emit(GeneralNewsFetchSuccess(generalNews: updatedResults, totalCount: result[TOTAL], hasMoreFetchError: false, hasMore: updatedResults.length < result[TOTAL]));
+        } else {
+          emit(GeneralNewsFetchFailure(result[MESSAGE]));
+        }
+      } catch (e) {
+        emit(GeneralNewsFetchSuccess(
+            generalNews: (state as GeneralNewsFetchSuccess).generalNews,
+            hasMoreFetchError: true,
+            totalCount: (state as GeneralNewsFetchSuccess).totalCount,
+            hasMore: (state as GeneralNewsFetchSuccess).hasMore));
+      }
+    }
+  }
+}