feat(proj): init

2026-09-21 04:06:43 +03:00
commit c956b94983
1076 changed files with 50876 additions and 0 deletions
@@ -0,0 +1,60 @@
+import 'package:intl/intl.dart';
+
+/// `1 234,50 ₽` — same shape as the web cabinet.
+String formatMoney(double amount, {String currency = 'RUB', bool compact = false}) {
+  final symbol = switch (currency) {
+    'RUB' => '₽',
+    'USD' => r'$',
+    'EUR' => '€',
+    _ => currency,
+  };
+
+  final formatter = compact
+      ? NumberFormat.decimalPattern('ru')
+      : NumberFormat('#,##0.00', 'ru');
+  final value = compact ? amount.round() : amount;
+
+  return '${formatter.format(value)} $symbol'.replaceAll('\u00A0', ' ');
+}
+
+String formatSignedMoney(double amount, {String currency = 'RUB'}) {
+  final sign = amount < 0 ? '+' : '−';
+  return '$sign${formatMoney(amount.abs(), currency: currency)}';
+}
+
+String formatDay(DateTime date) => DateFormat('d MMMM', 'ru').format(date);
+
+String formatShortDate(DateTime date) => DateFormat('dd.MM.yyyy').format(date);
+
+String formatWeekday(DateTime date) => DateFormat('EEEE', 'ru').format(date);
+
+/// `Сегодня` / `Вчера` / `12 сентября` — headers of the journal.
+String formatRelativeDay(DateTime date, {DateTime? now}) {
+  final today = _dayOf(now ?? DateTime.now());
+  final day = _dayOf(date);
+  final diff = today.difference(day).inDays;
+
+  return switch (diff) {
+    0 => 'Сегодня',
+    1 => 'Вчера',
+    _ => formatDay(day),
+  };
+}
+
+/// `осталось 5 дней` — Russian plural rules.
+String formatDaysLeft(int days) {
+  if (days <= 0) return 'период завершён';
+  return 'осталось ${plural(days, 'день', 'дня', 'дней')}';
+}
+
+String plural(int count, String one, String few, String many) {
+  final mod100 = count % 100;
+  final mod10 = count % 10;
+
+  if (mod100 >= 11 && mod100 <= 14) return '$count $many';
+  if (mod10 == 1) return '$count $one';
+  if (mod10 >= 2 && mod10 <= 4) return '$count $few';
+  return '$count $many';
+}
+
+DateTime _dayOf(DateTime value) => DateTime(value.year, value.month, value.day);