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src/WorkTime.Mobile/Pages/CapturePage.xaml.cs

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+using System.Collections.ObjectModel;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using WorkTime.Models;
+using WorkTime.Models.Repositories;
+
+namespace WorkTime.Mobile.Pages;
+
+public partial class CapturePage : ContentPage {
+    private readonly CapturePageModel _model;
+    
+    public CapturePage(CapturePageModel model) {
+        InitializeComponent();
+        BindingContext = model;
+        _model = model;
+    }
+
+    protected override void OnAppearing() {
+        base.OnAppearing();
+        
+        if (_model.AppearingCommand.CanExecute(null))
+            _model.AppearingCommand.Execute(null);
+    }
+}
+
+public partial class CapturePageModel(ITimeEntryRepository entryRepository) : ObservableObject {
+    
+    private DateOnly _currentDate = DateOnly.FromDateTime(DateTime.Now);
+
+    [ObservableProperty]
+    public partial ObservableCollection<TimeEntry> Entries { get; set; } = new();
+
+    [ObservableProperty]
+    public partial EntryType CurrentType { get; set; } = EntryType.Login;
+
+    public string CurrentTypeName => CurrentType switch {
+        EntryType.Login => "Einstempeln",
+        EntryType.LoginHome => "Einstempeln (mobA)",
+        EntryType.LoginTrip => "Dienstreise starten",
+        EntryType.Logout => "Ausstempeln",
+        EntryType.LogoutHome => "Ausstempeln (mobA)",
+        EntryType.LogoutTrip => "Dienstreise beenden",
+        _ => "UNKNOWN"
+    };
+
+    partial void OnCurrentTypeChanged(EntryType value) {
+        OnPropertyChanged(nameof(CurrentTypeName));
+    }
+
+    [RelayCommand]
+    public async Task LoadDate(DateOnly date) {
+        _currentDate = date;
+        Entries.Clear();
+        
+        var result = await entryRepository.GetTimeEntries(date);
+        foreach (var entry in result) {
+            Entries.Add(entry);
+        }
+
+        UpdateCurrentType();
+    }
+
+    private void UpdateCurrentType() {
+        var last = Entries.LastOrDefault();
+        
+        if (last is null) {
+            CurrentType = EntryType.Login;
+            return;
+        }
+        
+        CurrentType = last.Type switch {
+            EntryType.Login => EntryType.Logout,
+            EntryType.LoginHome => EntryType.LogoutHome,
+            EntryType.LoginTrip => EntryType.LogoutTrip,
+
+            EntryType.Logout => EntryType.Login,
+            EntryType.LogoutHome => EntryType.LoginHome,
+            EntryType.LogoutTrip => EntryType.LoginTrip,
+            
+            _ => EntryType.Login
+        };
+    }
+
+    [RelayCommand]
+    public async Task OnAppearing() {
+        await LoadDate(_currentDate);
+    }
+
+    [RelayCommand]
+    public async Task RegisterEntry(TimeEntry? entry = null) {
+        entry ??= new TimeEntry {
+            Timestamp = DateTime.Now,
+            Type = CurrentType
+        };
+        
+        await entryRepository.AddTimeEntry(entry);
+        await LoadDate(_currentDate);
+    }
+
+    [RelayCommand]
+    public async Task DeleteEntry(Guid entryId) {
+        await entryRepository.DeleteTimeEntry(entryId);
+        await LoadDate(_currentDate);
+    }
+    
+}