Code cleanup and optimizing

GUT.Schedule/GUTSchedule.UWP/Pages/AboutPage.xaml

@@ -0,0 +1,65 @@
+<Page
+    x:Class="GUTSchedule.UWP.Pages.AboutPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
+	Loaded="Page_Loaded">
+
+	<Page.TopAppBar>
+		<CommandBar ClosedDisplayMode="Compact" Background="{StaticResource SystemAccentColor}" RequestedTheme="Dark">
+			<CommandBar.Content>
+				<Grid>
+					<Grid.ColumnDefinitions>
+						<ColumnDefinition Width="auto"/>
+						<ColumnDefinition/>
+					</Grid.ColumnDefinitions>
+					<Button Width="48" Height="48" Margin="0" Background="Transparent" Click="BackRequested">
+						<SymbolIcon Symbol="Back"/>
+					</Button>
+					<TextBlock x:Uid="aboutTitle" Text="About application" Style="{StaticResource TitleTextBlockStyle}" Margin="10,6" Grid.Column="1"/>
+				</Grid>
+			</CommandBar.Content>
+		</CommandBar>
+	</Page.TopAppBar>
+
+	<ScrollViewer>
+		<StackPanel Margin="10">
+			<TextBlock x:Uid="appName" Style="{StaticResource TitleTextBlockStyle}" Text="GUT.Schedule"/>
+			<TextBlock Style="{StaticResource CaptionTextBlockStyle}" Text="v$(Build.BuildNumber) (ci-id #$(Build.BuildId))" Foreground="DarkGray" Margin="0,0,0,10" x:Name="version"/>
+
+			<TextBlock x:Uid="appDescription" Text="appDescription"/>
+
+			<TextBlock x:Uid="developedBy" Text="developedBy"/>
+
+			<TextBlock x:Uid="contributorsTitle" x:Name="contributorsTitle" Style="{StaticResource SubtitleTextBlockStyle}" Text="Contributors" Margin="0,10,0,0" Visibility="Collapsed"/>
+			<TextBlock x:Name="contributors" Visibility="Collapsed"/>
+
+			<TextBlock x:Uid="specialThanksTitle" Style="{StaticResource SubtitleTextBlockStyle}" Text="Special thanks" Margin="0,10,0,0"/>
+			<TextBlock x:Uid="specialThanksPeople"/>
+
+			<TextBlock x:Uid="contactsTitle" Style="{StaticResource SubtitleTextBlockStyle}" Text="Contacts" Margin="0,10,0,0"/>
+			<TextBlock>
+				<Run x:Uid="websiteContact">Website</Run>: <Hyperlink NavigateUri="https://xfox111.net">https://xfox111.net</Hyperlink><LineBreak/>
+				<Run x:Uid="twitterContact">Twitter</Run>: <Hyperlink NavigateUri="https://twitter.com/xfox111">@xfox111</Hyperlink><LineBreak/>
+				<Run x:Uid="vkontakteContact">VKontakte</Run>: <Hyperlink NavigateUri="https://vk.com/xfox.mike">@xfox.mike</Hyperlink><LineBreak/>
+				<Run>LinkedIn</Run>: <Hyperlink NavigateUri="https://linkedin.com/in/xfox">@xfox</Hyperlink><LineBreak/>
+				<Run>GitHub</Run>: <Hyperlink NavigateUri="https://github.com/xfox111">@xfox111</Hyperlink>
+			</TextBlock>
+			
+			<TextBlock x:Uid="linksTitle" Style="{StaticResource SubtitleTextBlockStyle}" Text="Useful links" Margin="0,10,0,0"/>
+			<TextBlock>
+				<Hyperlink NavigateUri="https://xfox111.net/Projects/GUTSchedule/PrivacyPolicy.txt"><Run x:Uid="privacyPolicyLink">Privacy policy</Run></Hyperlink><LineBreak/>
+				<Hyperlink NavigateUri="https://www.gnu.org/licenses/gpl-3.0">General Public License v3</Hyperlink><LineBreak/>
+				<Hyperlink NavigateUri="https://github.com/xfox111/gutschedule"><Run x:Uid="repositoryLink">GitHub repository</Run></Hyperlink><LineBreak/>
+				<Hyperlink NavigateUri="http://tios.spbgut.ru/index.php"><Run x:Uid="notsLink">"TIES" RF</Run></Hyperlink><LineBreak/>
+				<Hyperlink NavigateUri="https://sut.ru"><Run x:Uid="sutLink">SPbSUT</Run></Hyperlink>
+			</TextBlock>
+
+			<TextBlock Style="{StaticResource CaptionTextBlockStyle}" Text="©2020 Michael &#x22;XFox&#x22; Gordeev" Margin="0,10,0,0"/>
+			<Button x:Uid="leaveFeedback" Content="Leave feedback" HorizontalAlignment="Left" Margin="5" Click="Feedback_Click"/>
+		</StackPanel>
+	</ScrollViewer>
+</Page>

GUT.Schedule/GUTSchedule.UWP/Pages/AboutPage.xaml.cs

@@ -0,0 +1,88 @@
+using Microsoft.Services.Store.Engagement;
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using Windows.ApplicationModel;
+using Windows.Data.Json;
+using Windows.System;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Documents;
+
+namespace GUTSchedule.UWP.Pages
+{
+	public sealed partial class AboutPage : Page
+	{
+		public AboutPage()
+		{
+			InitializeComponent();
+			KeyDown += (s, e) =>
+			{
+				if (e.Key == VirtualKey.Back || e.Key == VirtualKey.GoBack)
+					BackRequested(s, null);
+			};
+		}
+
+		private async void Page_Loaded(object sender, RoutedEventArgs e)
+		{
+			PackageVersion ver = Package.Current.Id.Version;
+			version.Text = $"v{ver.Major}{(ver.Minor < 1000 ? "0" + ver.Minor : ver.Minor.ToString())}.{ver.Revision} (ci-id #{ver.Build})";
+
+			List<string> contributorsList = new List<string>();
+			try
+			{
+				HttpClient client = new HttpClient();
+				HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, "https://api.github.com/repos/xfox111/gutschedule/contributors");
+				request.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0");
+
+				HttpResponseMessage response = await client.SendAsync(request);
+				string resposeContent = await response.Content.ReadAsStringAsync();
+				JsonObject parsedResponse = JsonObject.Parse(resposeContent);
+
+				foreach (var i in parsedResponse)
+					if (i.Value.GetObject()["type"].GetString() == "User" && i.Value.GetObject()["login"].GetString().ToLower() != "xfox111")
+						contributorsList.Add(i.Value.GetObject()["login"].GetString());
+
+				request.Dispose();
+				client.Dispose();
+			}
+			finally
+			{
+				if (contributorsList.Count > 0)
+				{
+					foreach(string i in contributorsList)
+					{
+						Hyperlink link = new Hyperlink
+						{
+							NavigateUri = new Uri("https://github.com.i")
+						};
+						link.Inlines.Add(new Run
+						{
+							Text = "@" + i
+						});
+						contributors.Inlines.Add(link);
+						contributors.Inlines.Add(new Run
+						{
+							Text = ", "
+						});
+					}
+					contributors.Inlines.RemoveAt(contributors.Inlines.Count - 1);
+
+					contributorsTitle.Visibility = Visibility.Visible;
+					contributors.Visibility = Visibility.Visible;
+				}
+			}
+		}
+
+		private async void Feedback_Click(object sender, RoutedEventArgs e)
+		{
+			if (StoreServicesFeedbackLauncher.IsSupported())
+				await StoreServicesFeedbackLauncher.GetDefault().LaunchAsync();
+			else
+				await Launcher.LaunchUriAsync(new Uri("mailto:feedback@xfox111.net"));
+		}
+
+		private void BackRequested(object sender, RoutedEventArgs e) =>
+			Frame.GoBack();
+	}
+}

GUT.Schedule/GUTSchedule.UWP/Pages/MainPage.xaml

@@ -0,0 +1,133 @@
+<Page
+    x:Class="GUTSchedule.UWP.Pages.MainPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+	Loaded="Page_Loaded">
+
+	<Page.Background>
+		<ImageBrush ImageSource="https://cabs.itut.ru/cabinet/ini/general/0/cabinet/img/bg_n.jpg" Stretch="UniformToFill"/>
+	</Page.Background>
+
+	<Page.TopAppBar>
+		<CommandBar ClosedDisplayMode="Compact" Background="{StaticResource SystemAccentColor}" RequestedTheme="Dark">
+			<CommandBar.Content>
+				<TextBlock x:Uid="appName" Text="GUT.Schedule" Style="{StaticResource TitleTextBlockStyle}" Margin="10,6"/>
+			</CommandBar.Content>
+			<CommandBar.SecondaryCommands>
+				<AppBarButton x:Uid="clearCalendarOption" Icon="Delete" Label="Clear schedule" Tag="clear" Click="AppBarButton_Click"/>
+				<AppBarButton x:Uid="reportErrorOption" Label="Report error" Tag="report" Click="AppBarButton_Click">
+					<AppBarButton.Icon>
+						<FontIcon Glyph="&#xEBE8;"/>
+					</AppBarButton.Icon>
+				</AppBarButton>
+				<AppBarButton x:Uid="aboutOption" Label="About application" Tag="about" Click="AppBarButton_Click">
+					<AppBarButton.Icon>
+						<FontIcon Glyph="&#xE946;"/>
+					</AppBarButton.Icon>
+				</AppBarButton>
+			</CommandBar.SecondaryCommands>
+		</CommandBar>
+	</Page.TopAppBar>
+
+	<Grid>
+		<VisualStateManager.VisualStateGroups>
+			<VisualStateGroup>
+				<VisualState>
+					<VisualState.StateTriggers>
+						<AdaptiveTrigger MinWindowWidth="800"/>
+					</VisualState.StateTriggers>
+					<VisualState.Setters>
+						<Setter Target="grid.ColumnDefinitions[1].Width" Value="*"/>
+					</VisualState.Setters>
+				</VisualState>
+				<VisualState>
+					<VisualState.StateTriggers>
+						<AdaptiveTrigger MinWindowWidth="1200"/>
+					</VisualState.StateTriggers>
+					<VisualState.Setters>
+						<Setter Target="grid.ColumnDefinitions[1].Width" Value="2*"/>
+					</VisualState.Setters>
+				</VisualState>
+			</VisualStateGroup>
+		</VisualStateManager.VisualStateGroups>
+		
+		<ScrollViewer>
+			<Grid x:Name="grid">
+				<Grid.ColumnDefinitions>
+					<ColumnDefinition/>
+					<ColumnDefinition Width="0"/>
+				</Grid.ColumnDefinitions>
+				<StackPanel Padding="10" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+					<TextBlock x:Uid="scheduleParametersTitle" Style="{StaticResource SubtitleTextBlockStyle}" Text="Schedule parameters"/>
+
+					<CheckBox x:Uid="authorizeCheckbox" Content="Authorize via personal cabinet" Checked="ChangeAuthorizationMethod" Unchecked="ChangeAuthorizationMethod" IsChecked="True" x:Name="authorize"/>
+					<StackPanel x:Name="credentialMethod">
+						<TextBox x:Uid="email" PlaceholderText="E-mail" x:Name="email"/>
+						<PasswordBox x:Uid="password" PlaceholderText="Password" x:Name="password"/>
+						<CheckBox x:Uid="remember" Content="Remember" x:Name="rememberCredential" Checked="RememberCredential_Checked" Unchecked="RememberCredential_Checked"/>
+					</StackPanel>
+					<StackPanel x:Name="defaultMethod" Visibility="Collapsed">
+						<ComboBox x:Uid="facultySpinner" x:Name="faculty" PlaceholderText="No schedule is available" Header="Course" SelectionChanged="Faculty_SelectionChanged"/>
+						<ComboBox x:Uid="courseSpinner" x:Name="course" Header="Course" SelectionChanged="Course_SelectionChanged">
+							<ComboBoxItem Content="1"/>
+							<ComboBoxItem Content="2"/>
+							<ComboBoxItem Content="3"/>
+							<ComboBoxItem Content="4"/>
+						</ComboBox>
+						<ComboBox x:Uid="groupSpinner" x:Name="group" PlaceholderText="No schedule is available" Header="Group" SelectionChanged="Group_SelectionChanged"/>
+					</StackPanel>
+
+					<TextBlock x:Uid="exportParametersTitle" Style="{StaticResource SubtitleTextBlockStyle}" Text="Export parameters"/>
+
+					<Grid>
+						<Grid.ColumnDefinitions>
+							<ColumnDefinition/>
+							<ColumnDefinition/>
+						</Grid.ColumnDefinitions>
+						<Grid.RowDefinitions>
+							<RowDefinition Height="Auto"/>
+							<RowDefinition Height="Auto"/>
+						</Grid.RowDefinitions>
+
+						<CalendarDatePicker x:Uid="dateRangeFrom" Header="Export from" x:Name="startDate"/>
+						<CalendarDatePicker x:Uid="dateRangeTo" Grid.Row="1" Header="Export to" VerticalAlignment="Top" x:Name="endDate"/>
+
+						<Button x:Uid="today" Content="Today" Grid.Column="1" VerticalAlignment="Bottom" Click="SetTodayDate" />
+						<StackPanel Grid.Column="1" Grid.Row="1" Margin="0,28,0,0">
+							<Button x:Uid="forDay" Content="For day" Click="SetEndDate" Tag="0"/>
+							<Button x:Uid="forWeek" Content="For week" Click="SetEndDate" Tag="6"/>
+							<Button x:Uid="forMonth" Content="For month" Click="SetEndDate" Tag="30"/>
+							<Button x:Uid="forSemester" Content="For semester" Click="SetForSemester"/>
+						</StackPanel>
+					</Grid>
+
+					<ComboBox x:Uid="reminderSpinner" Header="Set reminder for:" x:Name="reminder" SelectionChanged="Reminder_SelectionChanged">
+						<ComboBoxItem x:Uid="noReminder" Content="None"/>
+						<ComboBoxItem x:Uid="inTimeReminder" Content="At the begining of event"/>
+						<ComboBoxItem x:Uid="fiveMinuteReminder" Content="5 minutes"/>
+						<ComboBoxItem x:Uid="tenMinuteReminder" Content="10 minutes"/>
+					</ComboBox>
+
+					<CheckBox x:Uid="addGroupToTitle" Content="Add group number to event title" x:Name="addGroupToTitle" Checked="AddGroupToTitle_Checked" Unchecked="AddGroupToTitle_Checked"/>
+					<TextBlock x:Uid="titleNote" Style="{StaticResource CaptionTextBlockStyle}" Text="note"/>
+
+					<TextBlock Foreground="Red" Visibility="Collapsed" Text="Error" x:Name="errorPlaceholder"/>
+					<Button x:Uid="addScheduleButton" Content="Add schedule" Background="{StaticResource SystemAccentColor}" Foreground="White" FontWeight="Bold" Margin="0,10" Click="Export"/>
+
+					<TextBlock x:Uid="copyrights" Style="{StaticResource CaptionTextBlockStyle}" Text="©2020 Michael Gordeev, INS, ICT-907"/>
+					<TextBlock Style="{StaticResource CaptionTextBlockStyle}" Text="v$(Build.BuildNumber) (ci-id #$(Build.BuildId))" x:Name="version"/>
+				</StackPanel>
+			</Grid>
+		</ScrollViewer>
+
+		<Grid Background="{StaticResource SystemAccentColor}" x:Name="loading" Visibility="Collapsed">
+			<StackPanel VerticalAlignment="Center">
+				<ProgressRing Width="100" Height="100" Foreground="White" IsActive="True" HorizontalAlignment="Center"/>
+				<TextBlock Style="{StaticResource TitleTextBlockStyle}" x:Name="status" Text="Processing..." HorizontalAlignment="Center" Foreground="White" Margin="0,20"/>
+			</StackPanel>
+		</Grid>
+	</Grid>
+</Page>

GUT.Schedule/GUTSchedule.UWP/Pages/MainPage.xaml.cs

@@ -0,0 +1,280 @@
+using GUTSchedule.Models;
+using GUTSchedule.UWP.Controls;
+using System;
+using Windows.Security.Credentials;
+using Windows.System;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using Windows.UI.Popups;
+using System.Threading.Tasks;
+using Windows.ApplicationModel.Resources;
+using Windows.Storage;
+using Microsoft.Services.Store.Engagement;
+using Windows.ApplicationModel;
+using Windows.ApplicationModel.Core;
+
+namespace GUTSchedule.UWP.Pages
+{
+	public sealed partial class MainPage : Page
+	{
+		private readonly PasswordVault vault = new PasswordVault();
+		private readonly ResourceLoader resources = ResourceLoader.GetForCurrentView();
+		static readonly ApplicationDataContainer settings = ApplicationData.Current.LocalSettings;
+
+		public MainPage() =>
+			InitializeComponent();
+
+		private async void Page_Loaded(object sender, RoutedEventArgs args)
+		{
+			try
+			{
+				PackageVersion ver = Package.Current.Id.Version;
+				version.Text = $"v{ver.Major}{(ver.Minor < 1000 ? "0" + ver.Minor : ver.Minor.ToString())}.{ver.Revision} (ci-id #{ver.Build})";
+
+				authorize.IsChecked = (bool?)settings.Values["Authorize"] ?? true;
+				if (vault.RetrieveAll() is IReadOnlyList<PasswordCredential> credentials && credentials.Count > 0)
+				{
+					email.Text = credentials.First().UserName;
+					credentials.First().RetrievePassword();
+					password.Password = credentials.First().Password;
+				}
+				rememberCredential.IsChecked = (bool?)settings.Values["RememberCredential"] ?? true;
+
+				faculty.ItemsSource = (await Parser.GetFaculties()).Select(i => new ComboBoxItem
+				{
+					Content = i.name,
+					Tag = i.id,
+					IsSelected = (string)settings.Values["Faculty"] == i.id
+				}).ToList();
+				faculty.SelectedIndex = (faculty.ItemsSource as List<ComboBoxItem>).FindIndex(i => i.IsSelected);
+				if (faculty.SelectedIndex < 0)
+					faculty.SelectedIndex = 0;
+				course.SelectedIndex = (int?)settings.Values["Course"] ?? 0;
+
+				startDate.Date = DateTime.Today;
+				endDate.Date = startDate.Date.Value.AddDays(6);
+
+				reminder.SelectedIndex = (int?)settings.Values["Reminder"] ?? 2;
+				addGroupToTitle.IsChecked = (bool?)settings.Values["AddGroupToTitle"] ?? false;
+			}
+			catch (HttpRequestException e)
+			{
+				PushInternetExceptionMessage(e, () => Page_Loaded(sender, args));
+				return;
+			}
+			catch (Exception e)
+			{
+				MessageDialog dialog = new MessageDialog(e.Message, e.GetType().ToString());
+				dialog.Commands.Add(new UICommand("OK", (command) => CoreApplication.Exit()));
+
+				await dialog.ShowAsync();
+			}
+		}
+
+		private async void AppBarButton_Click(object sender, RoutedEventArgs e)
+		{
+			switch (((FrameworkElement)sender).Tag)
+			{
+				case "clear":
+					ClearCalendarControl clearControl = new ClearCalendarControl();
+					ContentDialogResult result = await clearControl.ShowAsync();
+					if(result == ContentDialogResult.Primary)
+					{
+						await Calendar.Clear(clearControl.SelectedCalendars, clearControl.ClearUpcomingOnly);
+						await new MessageDialog(resources.GetString("clearScheduleDone"), resources.GetString("clearScheduleTitle/Title")).ShowAsync();
+					}
+					break;
+				case "about":
+					Frame.Navigate(typeof(AboutPage));
+					break;
+				case "report":
+					if (StoreServicesFeedbackLauncher.IsSupported())
+						await StoreServicesFeedbackLauncher.GetDefault().LaunchAsync();
+					else
+						await Launcher.LaunchUriAsync(new Uri("mailto:feedback@xfox111.net"));
+					break;
+			}
+		}
+
+		private void ChangeAuthorizationMethod(object sender, RoutedEventArgs e)
+		{
+			if (credentialMethod == null)
+				return;
+
+			if (authorize.IsChecked.Value)
+			{
+				credentialMethod.Visibility = Visibility.Visible;
+				defaultMethod.Visibility = Visibility.Collapsed;
+			}
+			else
+			{
+				credentialMethod.Visibility = Visibility.Collapsed;
+				defaultMethod.Visibility = Visibility.Visible;
+			}
+
+			settings.Values["Authorize"] = authorize.IsChecked;
+		}
+
+		private void SetTodayDate(object sender, RoutedEventArgs e) =>
+			startDate.Date = DateTime.Today;
+
+		private void SetEndDate(object sender, RoutedEventArgs e) =>
+			endDate.Date = startDate.Date.Value.AddDays(int.Parse(((FrameworkElement)sender).Tag as string));
+
+		private void SetForSemester(object sender, RoutedEventArgs e)
+		{
+			if (DateTime.Today.Month == 1)
+				endDate.Date = new DateTime(DateTime.Today.Year, 1, 31);
+			else if (DateTime.Today.Month > 8)
+				endDate.Date = new DateTime(DateTime.Today.Year + 1, 1, 31);
+			else
+				endDate.Date = new DateTime(DateTime.Today.Year, 8, 31);
+		}
+
+		private async void Export(object sender, RoutedEventArgs args)
+		{
+			errorPlaceholder.Visibility = Visibility.Collapsed;
+
+			if (startDate.Date > endDate.Date)
+			{
+				errorPlaceholder.Text = resources.GetString("invalidDateRangeError");
+				errorPlaceholder.Visibility = Visibility.Visible;
+				return;
+			}
+
+			ExportParameters exportParameters;
+
+			if (authorize.IsChecked.Value)
+			{
+				if (string.IsNullOrWhiteSpace(email.Text) || string.IsNullOrWhiteSpace(password.Password))
+				{
+					errorPlaceholder.Text = resources.GetString("invalidAuthorizationError");
+					errorPlaceholder.Visibility = Visibility.Visible;
+					return;
+				}
+
+				exportParameters = new CabinetExportParameters
+				{
+					Email = email.Text,
+					Password = password.Password,
+					EndDate = endDate.Date.Value.DateTime,
+					StartDate = startDate.Date.Value.DateTime
+				};
+
+				if (rememberCredential.IsChecked.Value)
+					vault.Add(new PasswordCredential
+					{
+						UserName = email.Text,
+						Password = password.Password,
+						Resource = "xfox111.gutschedule"
+					});
+				else
+					foreach (PasswordCredential credential in vault.RetrieveAll())
+						vault.Remove(credential);
+			}
+			else
+			{
+				if (group.Items.Count < 1)
+				{
+					errorPlaceholder.Text = resources.GetString("groupSelectionError");
+					errorPlaceholder.Visibility = Visibility.Visible;
+					return;
+				}
+
+				exportParameters = new DefaultExportParameters
+				{
+					EndDate = endDate.Date.Value.DateTime,
+					StartDate = startDate.Date.Value.DateTime,
+					Course = (course.SelectedIndex + 1).ToString(),
+					FacultyId = ((ComboBoxItem)faculty.SelectedItem).Tag as string,
+					GroupId = ((ComboBoxItem)group.SelectedItem).Tag as string
+				};
+			}
+
+			loading.Visibility = Visibility.Visible;
+			TopAppBar.Visibility = Visibility.Collapsed;
+			try
+			{
+				status.Text = resources.GetString("loadingStatus");
+				List<Occupation> schedule = await Parser.GetSchedule(exportParameters);
+
+				status.Text = resources.GetString("calendarExportStatus");
+				await Calendar.Export(schedule, addGroupToTitle.IsChecked.Value, (reminder.SelectedIndex - 1) * 5);
+
+				status.Text = resources.GetString("doneStatus");
+				await Task.Delay(1000);
+			}
+			catch (HttpRequestException e)
+			{
+				PushInternetExceptionMessage(e, () => Export(sender, args));
+				return;
+			}
+			catch (Exception e)
+			{
+				MessageDialog dialog = new MessageDialog(e.Message, e.GetType().ToString());
+				dialog.Commands.Add(new UICommand("OK", (command) => loading.Visibility = Visibility.Collapsed));
+
+				await dialog.ShowAsync();
+			}
+
+			loading.Visibility = Visibility.Collapsed;
+			TopAppBar.Visibility = Visibility.Visible;
+		}
+
+		private void Faculty_SelectionChanged(object sender, SelectionChangedEventArgs e)
+		{
+			UpdateGroupsList();
+			settings.Values["Faculty"] = ((ComboBoxItem)faculty.SelectedItem).Tag;
+		}
+
+		private void Course_SelectionChanged(object sender, SelectionChangedEventArgs e)
+		{
+			UpdateGroupsList();
+			settings.Values["Course"] = course.SelectedIndex;
+		}
+
+		private void Reminder_SelectionChanged(object sender, SelectionChangedEventArgs e) =>
+			settings.Values["Reminder"] = reminder.SelectedIndex;
+
+		private void Group_SelectionChanged(object sender, SelectionChangedEventArgs e)
+		{
+			if(group.SelectedItem != null)
+				settings.Values["Group"] = ((ComboBoxItem)group.SelectedItem).Tag;
+		}
+
+		private void RememberCredential_Checked(object sender, RoutedEventArgs e) =>
+			settings.Values["RememberCredential"] = rememberCredential.IsChecked;
+
+		private void AddGroupToTitle_Checked(object sender, RoutedEventArgs e) =>
+			settings.Values["AddGroupToTitle"] = rememberCredential.IsChecked;
+
+		private async void UpdateGroupsList()
+		{
+			List<(string id, string name)> groups = await Parser.GetGroups(((ComboBoxItem)faculty.SelectedItem).Tag as string, (course.SelectedIndex + 1).ToString());
+			group.ItemsSource = groups.Select(i => new ComboBoxItem
+			{
+				Content = i.name,
+				Tag = i.id,
+				IsSelected = (string)settings.Values["Group"] == i.id
+			}).ToList();
+			group.SelectedIndex = (group.ItemsSource as List<ComboBoxItem>).FindIndex(i => i.IsSelected);
+			if (group.SelectedIndex < 0)
+				group.SelectedIndex = 0;
+		}
+
+		public async void PushInternetExceptionMessage(HttpRequestException e, Action retryAction)
+		{
+			MessageDialog dialog = new MessageDialog(resources.GetString("connectionFailMessage"), e.Message);
+			dialog.Commands.Add(new UICommand(resources.GetString("repeat"), (command) => retryAction()));
+			dialog.Commands.Add(new UICommand("OK", (command) => loading.Visibility = Visibility.Collapsed));
+
+			dialog.CancelCommandIndex = 1;
+			dialog.DefaultCommandIndex = 0;
+
+			await dialog.ShowAsync();
+		}
+	}
+}