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news_viewmodel.dart
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news_viewmodel.dart
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// Package imports:
import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
import 'package:stacked/stacked.dart';
import 'package:ets_api_clients/models.dart';
// Project imports:
import 'package:notredame/features/app/repository/news_repository.dart';
import 'package:notredame/utils/locator.dart';
class NewsViewModel extends BaseViewModel implements Initialisable {
/// Load the events
final NewsRepository _newsRepository = locator<NewsRepository>();
final PagingController<int, News> pagingController =
PagingController(firstPageKey: 1);
bool isLoadingEvents = false;
String title = "";
@override
void initialise() {
// This will be called when init state cycle runs
pagingController.addPageRequestListener((pageKey) {
fetchPage(pageKey);
});
}
Future<void> fetchPage(int pageNumber) async {
try {
final pagination = await _newsRepository.getNews(
pageNumber: pageNumber,
title: title != "" ? title : null,
);
final isLastPage = pagination?.totalPages == pageNumber;
if (isLastPage) {
pagingController.appendLastPage(pagination?.news ?? []);
} else {
final nextPageKey = pageNumber + 1;
pagingController.appendPage(pagination?.news ?? [], nextPageKey);
}
} catch (error) {
pagingController.error = error;
}
}
void searchNews(String title) {
this.title = title;
pagingController.refresh();
}
}