Robo-advisory-dart/lib/providers/transaction_provider.dart

import 'package:flutter/foundation.dart';
import 'package:robo_advisory/models/transaction.dart';
import 'package:robo_advisory/repository/transaction.repository.dart';

class TransactionProvider with ChangeNotifier {
  String? _selectedCategory;
  List<Transaction> _transactionsData = [];

  List<Transaction> get transactionList {
    if (_selectedCategory == null) {
      return _transactionsData;
    }
    return _transactionsData
        .where((transaction) =>
            transaction.category.name == _selectedCategory?.toLowerCase())
        .toList();
  }

  void setTransactionsList(List<Transaction> transactions) {
    _transactionsData = transactions;
    notifyListeners();
  }

  String? get selectedCategory => _selectedCategory;

  void setSelectedCategory(String? category) {
    _selectedCategory = category;
    notifyListeners();
  }

  Future<List<Transaction>> loadTransactions() async {
    return (await TransactionRepository.loadTransactions() as List)
        .map((i) => Transaction.fromJson(i))
        .toList();
  }
}