llsajjad
125 lines
2.9 KiB
Dart
125 lines
2.9 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:tm_app/core/utils/result.dart';
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import 'package:tm_app/data/repositories/liked_tenders_repository.dart';
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import 'package:tm_app/data/services/model/liked_tender_feedback/liked_tender_feedback.dart';
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import 'package:tm_app/data/services/model/liked_tenders_response/liked_tenders_response.dart';
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class LikedTendersViewModel with ChangeNotifier {
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final LikedTendersRepository likedTendersRepository;
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LikedTendersViewModel({required this.likedTendersRepository}) {
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getLikedTenders(reset: true);
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}
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bool isLoading = false;
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bool isLoadingMore = false;
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bool hasMore = true;
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String? errorMessage;
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LikedTendersResponse? data;
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int _offset = 0;
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final int _limit = 7;
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int currentPage = 1;
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Future<void> getLikedTenders({bool reset = false}) async {
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if (!reset && (isLoadingMore || !hasMore)) {
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return;
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}
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if (reset) {
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_offset = (currentPage - 1) * _limit;
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hasMore = true;
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data = null;
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isLoading = true;
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notifyListeners();
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} else {
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if (_offset == 0) {
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isLoading = true;
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} else {
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isLoadingMore = true;
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}
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notifyListeners();
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}
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errorMessage = null;
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final result = await likedTendersRepository.getLikedTenders(
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offset: _offset,
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limit: _limit,
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);
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switch (result) {
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case Ok<LikedTendersResponse>():
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final incoming = result.value;
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final incomingList = incoming.data?.feedback ?? [];
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if (reset) {
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data = incoming;
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} else {
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final existingList = data?.data?.feedback ?? [];
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final combined = List<LikedTenderFeedback>.of(existingList)
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..addAll(incomingList);
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data = data?.copyWith(
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data: data?.data?.copyWith(
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feedback: combined,
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meta: incoming.data?.meta ?? data!.data!.meta,
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),
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);
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}
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hasMore = incomingList.length == _limit;
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_offset += _limit;
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errorMessage = null;
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break;
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case Error<LikedTendersResponse>():
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errorMessage = result.error.toString();
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break;
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}
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isLoading = false;
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isLoadingMore = false;
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notifyListeners();
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}
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Future<void> loadMoreIfNeeded() async {
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if (isLoadingMore || !hasMore) {
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return;
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}
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await getLikedTenders(reset: false);
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}
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Future<void> jumpToPage(int page) async {
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currentPage = page;
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_offset = (page - 1) * _limit;
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hasMore = true;
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await getLikedTenders(reset: true);
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}
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void removeTenderById(String id) {
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final current = data;
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final list = current?.data?.feedback;
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if (current == null || list == null) {
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return;
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}
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final updatedList = List<LikedTenderFeedback>.of(list)
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..removeWhere((e) => e.id == id);
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final updatedMeta = current.data?.meta?.copyWith(total: updatedList.length);
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data = current.copyWith(
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data: current.data?.copyWith(
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feedback: updatedList,
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meta: updatedMeta,
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),
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);
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notifyListeners();
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}
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}
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