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osu-lazer/osu.Game/Screens/OnlinePlay/OngoingOperationTracker.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
namespace osu.Game.Screens.OnlinePlay
{
/// <summary>
/// Utility class to track ongoing online operations' progress.
/// Can be used to disable interactivity while waiting for a response from online sources.
/// </summary>
public class OngoingOperationTracker
{
/// <summary>
/// Whether there is an online operation in progress.
/// </summary>
public IBindable<bool> InProgress => inProgress;
private readonly Bindable<bool> inProgress = new BindableBool();
private LeasedBindable<bool> leasedInProgress;
/// <summary>
/// Begins tracking a new online operation.
/// </summary>
/// <returns>
/// An <see cref="IDisposable"/> that will automatically mark the operation as ended on disposal.
/// </returns>
/// <exception cref="InvalidOperationException">An operation has already been started.</exception>
public IDisposable BeginOperation()
{
if (leasedInProgress != null)
throw new InvalidOperationException("Cannot begin operation while another is in progress.");
leasedInProgress = inProgress.BeginLease(true);
leasedInProgress.Value = true;
return new InvokeOnDisposal(endOperation);
}
private void endOperation()
{
if (leasedInProgress == null)
throw new InvalidOperationException("Cannot end operation multiple times.");
leasedInProgress.Return();
leasedInProgress = null;
}
}
}