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using Avalonia;
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using Avalonia.Controls;
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using LehrerApp.Desktop.Services;
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using LehrerApp.WebUntis;
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using Microsoft.Extensions.DependencyInjection;
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namespace LehrerApp.Desktop.Views;
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public sealed class OpenUntisPeriodsDialog : Window
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{
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private readonly WebUntisIntegrationService _service = App.Services.GetRequiredService<WebUntisIntegrationService>();
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private readonly WebUntisSettingsService _settings = App.Services.GetRequiredService<WebUntisSettingsService>();
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private readonly CancellationTokenSource _closed = new();
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private readonly ComboBox _mode = new() { ItemsSource = new[] { "Mein Unterricht", "Meine Klasse" }, SelectedIndex = 0 };
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private readonly ComboBox _element = new() { MinWidth = 150 };
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private readonly DatePicker _start = new();
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private readonly DatePicker _end = new() { SelectedDate = DateTimeOffset.Now };
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private readonly Button _load = new() { Content = "Abrufen" };
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private readonly Button _schoolYear = new() { Content = "Seit Schuljahresbeginn" };
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private readonly TextBlock _status = new() { TextWrapping = Avalonia.Media.TextWrapping.Wrap };
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private readonly StackPanel _rows = new() { Spacing = 12 };
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private readonly StackPanel _filters = new() { Spacing = 10, IsEnabled = false };
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private UntisOpenPeriodsMeta? _meta;
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private int _yearId;
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public OpenUntisPeriodsDialog()
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{
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Title = "Offene WebUntis-Stunden";
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Width = 850; Height = 650; MinWidth = 600; MinHeight = 450;
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WindowStartupLocation = WindowStartupLocation.CenterOwner;
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var root = new DockPanel { Margin = new Thickness(20) };
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var header = new StackPanel { Spacing = 12 };
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header.Children.Add(new TextBlock { Text = Title, FontSize = 22 });
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var selection = new StackPanel { Orientation = Avalonia.Layout.Orientation.Horizontal, Spacing = 12 };
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selection.Children.Add(_mode); selection.Children.Add(_element);
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_filters.Children.Add(selection);
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var dates = new WrapPanel { Orientation = Avalonia.Layout.Orientation.Horizontal };
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dates.Children.Add(new TextBlock { Text = "Von ", VerticalAlignment = Avalonia.Layout.VerticalAlignment.Center });
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dates.Children.Add(_start);
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dates.Children.Add(new TextBlock { Text = " bis ", VerticalAlignment = Avalonia.Layout.VerticalAlignment.Center });
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dates.Children.Add(_end);
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_filters.Children.Add(dates);
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var actions = new StackPanel { Orientation = Avalonia.Layout.Orientation.Horizontal, Spacing = 12 };
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actions.Children.Add(_schoolYear); actions.Children.Add(_load);
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_filters.Children.Add(actions);
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header.Children.Add(_filters); header.Children.Add(_status);
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DockPanel.SetDock(header, Dock.Top); root.Children.Add(header);
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root.Children.Add(new ScrollViewer { Content = _rows, Margin = new Thickness(0, 20, 0, 0) });
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Content = root;
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_mode.SelectionChanged += (_, _) => SelectMode();
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_element.SelectionChanged += (_, _) => ClearResults();
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_start.SelectedDateChanged += (_, _) => ClearResults();
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_end.SelectedDateChanged += (_, _) => ClearResults();
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_schoolYear.Click += (_, _) => { if (_meta is not null) _start.SelectedDate = new DateTimeOffset(_meta.SchoolYearStart.ToDateTime(TimeOnly.MinValue)); };
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_load.Click += async (_, _) => await LoadAsync();
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Opened += async (_, _) => await InitializeAsync();
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Closed += (_, _) => _closed.Cancel();
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}
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private void ClearResults() { _rows.Children.Clear(); _status.Text = "Auswahl festlegen und Abrufen wählen."; }
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private void SelectMode()
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{
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if (_meta is null) return;
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var own = _mode.SelectedIndex == 0;
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var elements = own ? _meta.Teachers : _meta.Classes;
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_element.ItemsSource = elements;
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var preferred = own ? _settings.TeacherUntisId ?? _meta.OwnTeacherId
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: _settings.HomeroomClassUntisId ?? _meta.MyClassIds.Cast<int?>().FirstOrDefault();
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_element.SelectedItem = elements.FirstOrDefault(x => x.Id == preferred)
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?? (!own ? elements.FirstOrDefault(x => _meta.MyClassIds.Contains(x.Id)) : null);
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ClearResults();
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}
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private async Task InitializeAsync()
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{
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_status.Text = "WebUntis-Auswahl wird geladen …";
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try
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{
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var today = DateOnly.FromDateTime(DateTime.Today);
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var date = today.Year * 10000 + today.Month * 100 + today.Day;
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var years = await _service.GetSchoolYearsAsync(_closed.Token);
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var year = years.FirstOrDefault(x => x.StartDate <= date && date <= x.EndDate)
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?? throw new InvalidDataException("Kein aktuelles WebUntis-Schuljahr gefunden.");
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_yearId = year.UntisId;
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_meta = await _service.GetOpenPeriodsMetaAsync(_yearId, _closed.Token);
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_start.SelectedDate = new DateTimeOffset(_meta.SchoolYearStart.ToDateTime(TimeOnly.MinValue));
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SelectMode();
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_filters.IsEnabled = true;
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if (_element.SelectedItem is not null) await LoadAsync();
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}
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catch (OperationCanceledException) when (_closed.IsCancellationRequested) { }
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catch (Exception ex) { _status.Text = $"Abruf fehlgeschlagen: {ex.Message}"; }
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}
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private async Task LoadAsync()
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{
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_rows.Children.Clear();
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if (_element.SelectedItem is not UntisOpenElement element || _start.SelectedDate is null || _end.SelectedDate is null)
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{ _status.Text = "Bitte Lehrkraft oder Klasse und Zeitraum auswählen."; return; }
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var start = DateOnly.FromDateTime(_start.SelectedDate.Value.DateTime);
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var end = DateOnly.FromDateTime(_end.SelectedDate.Value.DateTime);
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if (start > end || start < _meta!.SchoolYearStart || end > _meta.SchoolYearEnd)
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{ _status.Text = "Bitte einen gültigen Zeitraum innerhalb des Schuljahres auswählen."; return; }
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_filters.IsEnabled = false;
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_status.Text = "Offene Stunden werden geladen …";
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try
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{
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var own = _mode.SelectedIndex == 0;
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var periods = await _service.GetOpenPeriodsAsync(_yearId, own ? element.Id : null,
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own ? null : element.Id, start, end, _closed.Token);
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foreach (var period in periods)
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_rows.Children.Add(new TextBlock
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{
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Text = $"{period.When}\n{period.Classes} · {period.Subject} · {period.Teachers}\n{period.Missing}",
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TextWrapping = Avalonia.Media.TextWrapping.Wrap
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});
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_status.Text = periods.Count == 0 ? "Keine offenen Stunden im gewählten Zeitraum."
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: $"{periods.Count} offene Stunde(n) · Stand {DateTime.Now:HH:mm}";
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}
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catch (OperationCanceledException) when (_closed.IsCancellationRequested) { }
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catch (Exception ex) { _status.Text = $"Abruf fehlgeschlagen: {ex.Message}"; }
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finally { _filters.IsEnabled = true; }
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}
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}
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