DreamineLoggingWpfRegistration.cs

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using System;
using System.Windows;
using Dreamine.Logging.Options;
using Dreamine.Logging.Registration;
using Dreamine.Logging.Wpf.Services;
using Dreamine.Logging.Wpf.ViewModels;
using Dreamine.MVVM.Core;
 
namespace Dreamine.Logging.Wpf.Registration;

public static class DreamineLoggingWpfRegistration
{
    private static readonly object SyncRoot = new();
    private static bool _isExitHandlerRegistered;

    public static void Register(Action<DreamineLoggingOptions>? configure = null)
    {
        var options = new DreamineLoggingOptions();
        configure?.Invoke(options);
 
        IAsyncDisposable shutdownHandle = DreamineLoggingRegistration.Register(options);
 
        DMContainer.RegisterSingleton<WpfLogUiDispatcher>(
            new WpfLogUiDispatcher());
        DMContainer.RegisterSingleton<ILogUiDispatcher>(
            DMContainer.Resolve<WpfLogUiDispatcher>());
 
        DMContainer.Register<DreamineLogPanelViewModel>(() =>
            new DreamineLogPanelViewModel(
                DMContainer.Resolve<Dreamine.Logging.Interfaces.IDreamineLogStore>(),
                DMContainer.Resolve<ILogUiDispatcher>()));
 
        RegisterShutdownHandler(shutdownHandle);
    }

    public static void Reset()
    {
        lock (SyncRoot)
        {
            _isExitHandlerRegistered = false;
        }
    }

    private static void RegisterShutdownHandler(IAsyncDisposable shutdownHandle)
    {
        var app = Application.Current;
        if (app is null)
        {
            return;
        }
 
        lock (SyncRoot)
        {
            if (_isExitHandlerRegistered)
            {
                return;
            }
 
            _isExitHandlerRegistered = true;
        }
 
        app.Exit += (_, _) =>
        {
            try
            {
                shutdownHandle.DisposeAsync().AsTask().GetAwaiter().GetResult();
            }
            catch
            {
                // Shutdown errors must not prevent process exit.
            }
        };
    }
}