LehrerApp/LehrerApp.Desktop/Views/MainWindow.axaml.cs

using Avalonia.Controls;
using Avalonia.Input;
using LehrerApp.Desktop.ViewModels;
using LehrerApp.Sync;

namespace LehrerApp.Desktop.Views;

public partial class MainWindow : Window
{
    private static readonly TimeSpan FinalSyncDelay = TimeSpan.FromMilliseconds(350);
    private SyncEngine? _syncEngine;
    private bool _finalSyncStarted;
    private bool _closeAfterFinalSync;

    public MainWindow()
    {
        InitializeComponent();
        PointerMoved   += (_, _) => NotifyActivity();
        PointerPressed += (_, _) => NotifyActivity();
        KeyDown        += (_, _) => NotifyActivity();
    }

    public void EnableFinalSync(SyncEngine syncEngine)
    {
        _syncEngine = syncEngine;
        Closing += OnClosing;
    }

    private async void OnClosing(object? sender, WindowClosingEventArgs e)
    {
        if (_closeAfterFinalSync || _finalSyncStarted || _syncEngine is null)
            return;

        e.Cancel = true;
        _finalSyncStarted = true;
        await _syncEngine.SyncBeforeShutdownAsync(FinalSyncDelay);
        _closeAfterFinalSync = true;
        Close();
    }

    private void NotifyActivity()
    {
        if (DataContext is MainWindowViewModel vm) vm.AppLock.NotifyActivity();
    }

    private void OnLockScreenKeyDown(object? sender, KeyEventArgs e)
    {
        if (e.Key == Key.Enter && DataContext is MainWindowViewModel vm)
            vm.AppLock.UnlockCommand.Execute(null);
    }
}