121 lines
2.8 KiB
Dart
121 lines
2.8 KiB
Dart
// gets all quotes from the database and returns them in a list
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import 'package:flutter/material.dart';
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import 'package:frontend/model/quote.dart';
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import 'package:frontend/repository/quote_repository.dart';
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class QuoteProvider extends ChangeNotifier {
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List<Quote> _quotes = [];
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Set<String> _authors = {};
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bool _loading = false;
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String? _error;
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List<Quote> get quotes => _quotes;
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Set<String> get authors => _authors;
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bool get loading => _loading;
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String? get error => _error;
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List<Quote> get filteredQuotes {
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final query = filterController.text.toLowerCase();
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return _quotes.where((quote) {
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switch (filterBy) {
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case 0:
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return quote.author.toLowerCase().contains(query);
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case 1:
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return quote.body.toLowerCase().contains(query);
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default:
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return true;
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}
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}).toList();
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}
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final QuoteRepository repo = QuoteRepository();
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int filterBy = 0; // 0 = by author, 1 = by quote
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var filterController = TextEditingController(text: '');
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void clearFilterController() {
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filterController.text = '';
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}
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void filterQuotes() {
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notifyListeners();
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}
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QuoteProvider() {
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readQuotes(); // auto-load on creation
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}
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void populateAuthors() {
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_authors = {};
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for (var i = 0; i < quotes.length; i++) {
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_authors.add(quotes[i].author);
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}
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}
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void setFilterBy(int value) {
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filterBy = value;
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notifyListeners();
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}
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Future<void> readQuotes() async {
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_loading = true;
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_error = null;
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notifyListeners();
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try {
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_quotes = await repo.readQuotes();
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} catch (e) {
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_error = e.toString();
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}
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populateAuthors();
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_loading = false;
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notifyListeners();
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}
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Future<void> createQuote(Quote quote) async {
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final newQuote = await repo.createQuote(quote);
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_quotes.add(newQuote);
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populateAuthors();
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notifyListeners();
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}
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Future<void> updateQuote(Quote quote) async {
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try {
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_loading = true;
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notifyListeners();
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final updated = await repo.updateQuote(quote);
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final index = _quotes.indexWhere((q) => q.id == quote.id);
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if (index != -1) {
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final oldAuthor = _quotes[index].author;
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final newList = List<Quote>.from(_quotes);
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newList[index] = updated;
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_quotes = newList;
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Map<String, int> authorMap = {};
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for (final q in quotes) {
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authorMap[q.author] = (authorMap[q.author] ?? 0) + 1;
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}
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if (authorMap[oldAuthor] == 1) {
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_authors.remove(oldAuthor);
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}
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_authors.add(updated.author);
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}
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} finally {
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_loading = false;
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notifyListeners();
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}
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}
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Future<void> deleteQuote(Quote quote) async {
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await repo.deleteQuote(quote);
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_quotes.removeWhere((q) => q.id == quote.id);
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populateAuthors();
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notifyListeners();
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}
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} |