basic csv loader, transaction list & half done stats page

lib/repositories/account/account_repository.dart

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+import 'dart:convert';
+
+import 'package:rxdart/subjects.dart';
+import 'package:tunas/clients/storage/storage_client.dart';
+import 'package:tunas/repositories/account/models/account.dart';
+import 'package:tunas/repositories/account/models/transaction.dart';
+
+class AccountRepository {
+  String accountFile = 'main_account.json';
+
+  final StorageClient _storageClient;
+
+  final _transactionsController = BehaviorSubject<List<Transaction>>.seeded(const []);
+
+  AccountRepository({
+    required storageClient,
+  }) : _storageClient = storageClient {
+    init();
+  }
+
+  init() async {
+    final account = await getAccount();
+    _transactionsController.add(account.transactions);
+  }
+
+  Stream<List<Transaction>> getTransactionsStream() {
+    return _transactionsController.asBroadcastStream();
+  }
+
+  Future<Account> getAccount() async {
+    String json = await _storageClient.load(accountFile);
+    Map<String, dynamic> accountJson = jsonDecode(json);
+    return Account.fromJson(accountJson);
+  }
+
+  saveAccount(Account account) async {
+    await _storageClient.save(accountFile, jsonEncode(account.toJson()));
+  }
+
+  saveTransactions(List<Transaction> transactions) async {
+    final account = Account(transactions: transactions);
+    await saveAccount(account);
+    _transactionsController.add(account.transactions);
+  }
+}

lib/repositories/account/models/account.dart

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+import 'dart:convert';
+
+import 'transaction.dart';
+
+class Account {
+  List<Transaction> transactions;
+
+  Account({
+    this.transactions = const [],
+  });
+
+  factory Account.fromJson(Map<String, dynamic> json) {
+    return Account(
+      transactions: (jsonDecode(json['transactions']) as List<dynamic>).map((transaction) => Transaction.fromJson(transaction)).toList(),
+    );
+  }
+
+  Map<String, String> toJson() => {
+    'transactions': jsonEncode(transactions.map((transaction) => transaction.toJson()).toList()),
+  };
+}

lib/repositories/account/models/transaction.dart

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+class Transaction {
+  DateTime date;
+  String category;
+  String description;
+  String account;
+  double value;
+
+  Transaction({
+    required this.date,
+    required this.category,
+    required this.description,
+    required this.account,
+    required this.value
+  });
+
+  factory Transaction.fromJson(Map<String, dynamic> json) {
+    return Transaction(
+      date: DateTime.parse(json['date']),
+      category: json['category'],
+      description: json['description'],
+      account: json['account'],
+      value: double.parse(json['value']),
+    );
+  }
+
+  Map<String, String> toJson() => {
+    'date': date.toIso8601String(),
+    'category': category,
+    'description': description,
+    'account': account,
+    'value': value.toString(),
+  };
+}