forked from firka/student-legacy
86 lines
1.9 KiB
Dart
86 lines
1.9 KiB
Dart
// ignore_for_file: use_build_context_synchronously
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import 'dart:math';
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import 'package:filcnaplo/api/client.dart';
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import 'package:filcnaplo/models/news.dart';
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import 'package:filcnaplo/models/settings.dart';
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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class NewsProvider extends ChangeNotifier {
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// Private
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late List<News> _news;
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late int _state;
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late int _fresh;
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bool show = false;
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late BuildContext _context;
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// Public
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List<News> get news => _news;
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int get state => _fresh - 1;
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NewsProvider({
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List<News> initialNews = const [],
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required BuildContext context,
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}) {
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_news = List.castFrom(initialNews);
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_context = context;
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}
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Future<void> restore() async {
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// Load news state from the database
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var state_ = Provider.of<SettingsProvider>(_context, listen: false).newsState;
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if (state_ == -1) {
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var news_ = await FilcAPI.getNews();
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if (news_ != null) {
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state_ = news_.length;
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_news = news_;
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}
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}
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_state = state_;
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Provider.of<SettingsProvider>(_context, listen: false).update(newsState: _state);
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}
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Future<void> fetch() async {
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var news_ = await FilcAPI.getNews();
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if (news_ == null) return;
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_news = news_;
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_fresh = news_.length - _state;
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if (_fresh < 0) {
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_state = news_.length;
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Provider.of<SettingsProvider>(_context, listen: false).update(newsState: _state);
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}
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_fresh = max(_fresh, 0);
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if (_fresh > 0) {
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show = true;
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notifyListeners();
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}
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}
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void lock() => show = false;
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void release() {
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if (_fresh == 0) return;
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_fresh--;
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_state++;
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Provider.of<SettingsProvider>(_context, listen: false).update(newsState: _state);
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if (_fresh > 0) {
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show = true;
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} else {
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show = false;
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}
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notifyListeners();
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}
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}
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