feat(proj): init

2026-09-21 04:06:43 +03:00
commit c956b94983
1076 changed files with 50876 additions and 0 deletions
@@ -0,0 +1,116 @@
+import 'package:flutter/foundation.dart';
+import 'package:please_pay_me/core/state/async_value.dart';
+import 'package:please_pay_me/data/api/api_client.dart';
+import 'package:please_pay_me/data/models/expense.dart';
+import 'package:please_pay_me/data/repositories/repositories.dart';
+
+enum JournalScope {
+  current('Текущий'),
+  all('Все бюджеты');
+
+  const JournalScope(this.label);
+
+  final String label;
+}
+
+class ExpenseGroup {
+  const ExpenseGroup({required this.day, required this.items});
+
+  final DateTime day;
+  final List<Expense> items;
+
+  double get total => items.fold<double>(0, (sum, expense) => sum + expense.amount);
+}
+
+/// Paginated journal of operations with day grouping.
+class JournalController extends ChangeNotifier {
+  JournalController({required ExpenseRepository expenses, this.pageSize = 20})
+      : _expenses = expenses;
+
+  final ExpenseRepository _expenses;
+  final int pageSize;
+
+  AsyncValue<ExpensesPage> _state = const AsyncValue.loading();
+  JournalScope _scope = JournalScope.current;
+  int? _budgetId;
+  bool _loadingMore = false;
+
+  AsyncValue<ExpensesPage> get state => _state;
+  JournalScope get scope => _scope;
+  bool get isLoadingMore => _loadingMore;
+
+  List<Expense> get items => _state.valueOrNull?.items ?? const [];
+
+  bool get hasMore => _state.valueOrNull?.hasMore ?? false;
+
+  double get totalSum => _state.valueOrNull?.totalSum ?? 0;
+
+  /// Operations bucketed by day, newest first — the journal renders one
+  /// inset-grouped section per bucket.
+  List<ExpenseGroup> get groups {
+    final buckets = <DateTime, List<Expense>>{};
+    for (final expense in items) {
+      final day = DateTime(expense.spentAt.year, expense.spentAt.month, expense.spentAt.day);
+      buckets.putIfAbsent(day, () => []).add(expense);
+    }
+
+    final days = buckets.keys.toList()..sort((a, b) => b.compareTo(a));
+    return [for (final day in days) ExpenseGroup(day: day, items: buckets[day]!)];
+  }
+
+  void bindBudget(int? budgetId) {
+    if (_budgetId == budgetId) return;
+    _budgetId = budgetId;
+    load(silent: true);
+  }
+
+  Future<void> setScope(JournalScope scope) async {
+    if (_scope == scope) return;
+    _scope = scope;
+    notifyListeners();
+    await load();
+  }
+
+  Future<void> load({bool silent = false}) async {
+    if (!silent) {
+      _state = const AsyncValue.loading();
+      notifyListeners();
+    }
+
+    try {
+      _state = AsyncValue.data(await _fetch(1));
+    } on ApiException catch (error) {
+      _state = AsyncValue.error(error.message);
+    }
+    notifyListeners();
+  }
+
+  Future<void> loadMore() async {
+    final current = _state.valueOrNull;
+    if (current == null || !current.hasMore || _loadingMore) return;
+
+    _loadingMore = true;
+    notifyListeners();
+
+    try {
+      final next = await _fetch(current.page + 1);
+      _state = AsyncValue.data(
+        next.copyWithItems([...current.items, ...next.items]),
+      );
+    } on ApiException catch (error) {
+      _state = AsyncValue.error(error.message);
+    } finally {
+      _loadingMore = false;
+      notifyListeners();
+    }
+  }
+
+  Future<ExpensesPage> _fetch(int page) {
+    return _expenses.page(
+      page: page,
+      pageSize: pageSize,
+      budgetId: _scope == JournalScope.all ? null : _budgetId,
+      all: _scope == JournalScope.all,
+    );
+  }
+}