add display dates for weeks when schedule is not available

lib/common/utils/date_utils.dart

@@ -43,6 +43,14 @@ DateTime getStartOfStudyWeek(int week, DateTime nowTime) {
   return startWeekDate;
 }
 
+DateTime getEndOfStudyWeek(int week, DateTime nowTime) {
+  return getStartOfStudyWeek(week, nowTime).add(
+    const Duration(
+      days: 6,
+    ),
+  );
+}
+
 DateTime getStartOfStudyYearDate(DateTime nowTime) {
   if (nowTime.month >= kSeptemberMonthNumber) {
     return getWeekStart(

lib/feature/schedule/domain/schedule_transformer.dart

@@ -31,7 +31,7 @@ class ScheduleTransformer {
     for (final daySchedule in schedule.daySchedules) {
       result += DateFormat('dd.MM.yyyy').format(daySchedule.day);
       result += space;
-      result += DateFormat('EEE', 'ru').format(daySchedule.day);
+      result += DateFormat('EEE').format(daySchedule.day);
       result += newLine;
 
       if (daySchedule.lessons.isEmpty) {

lib/feature/schedule/widget/schedule_widget.dart

@@ -130,12 +130,30 @@ class ScheduleWidget extends StatelessWidget {
     }
 
     if (currentSchedule.daySchedules.isEmpty) {
+      final dateFormat = DateFormat(
+        'dd MMMM yyyy',
+      );
+      final currentTime = DateTime.now();
+      final weekStart = dateFormat.format(
+        getStartOfStudyWeek(
+          currentSchedule.week,
+          currentTime,
+        ),
+      );
+      final weekEnd = dateFormat.format(
+        getEndOfStudyWeek(
+          currentSchedule.week,
+          currentTime,
+        ),
+      );
+
       return Center(
         child: Column(
           mainAxisSize: MainAxisSize.min,
           crossAxisAlignment: CrossAxisAlignment.center,
           children: [
             Text(AppLocalizations.of(context)!.noSchedule),
+            Text('$weekStart - $weekEnd'),
             const SizedBox(
               height: 8,
             ),

lib/main.dart

@@ -5,11 +5,11 @@ import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:home_widget/home_widget.dart';
+import 'package:intl/intl.dart';
 import 'package:l/l.dart';
 import 'package:octopus/octopus.dart';
 import 'package:uneconly/common/app_scroll_configuration.dart';
 import 'package:uneconly/common/logging/logging_repository.dart';
-import 'package:uneconly/common/logging/logging_repository_factory.dart';
 import 'package:uneconly/common/model/dependencies.dart';
 import 'package:uneconly/common/routing/routes.dart';
 import 'package:uneconly/common/util/error_util.dart';
@@ -94,12 +94,12 @@ class _MyAppState extends State<MyApp> {
 
     HomeWidget.setAppGroupId('group.roadmapik.test');
 
+    // TODO: add multiple language support
+    Intl.defaultLocale = 'ru';
+
     final defaultLocale = Platform.localeName;
     locale = defaultLocale.split('_')[0];
 
-    const defaultTheme = 'blue';
-    theme = defaultTheme;
-
     dependencies.settingsRepository.getLanguage().then(
       (value) {
         if (value != null) {
@@ -118,6 +118,9 @@ class _MyAppState extends State<MyApp> {
       });
     });
 
+    const defaultTheme = 'blue';
+    theme = defaultTheme;
+
     dependencies.settingsRepository.getTheme().then(
       (value) {
         if (value != null) {

test/date_utils_test.dart

@@ -43,6 +43,12 @@ void main() {
     expect(getStartOfStudyWeek(36, nowTime), equals(DateTime(2023, 5, 1)));
   });
 
+  test('getEndOfStudyWeek returns end of study week', () {
+    final nowTime = DateTime(2024, 8, 18, 16, 10, 11);
+
+    expect(getEndOfStudyWeek(51, nowTime), equals(DateTime(2024, 8, 18)));
+  });
+
   test('getWeekStart returns start of week', () {
     final nowTime = DateTime(2023, 5, 6, 21, 49, 11);