osu/osu.Game/Online/BeatmapDownloadTracker.cs

137 lines
4.5 KiB
C#

// 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.Game.Beatmaps;
using osu.Game.Online.API;
#nullable enable
namespace osu.Game.Online
{
public class BeatmapDownloadTracker : DownloadTracker<IBeatmapSetInfo>
{
[Resolved(CanBeNull = true)]
protected BeatmapManager? Manager { get; private set; }
[Resolved(CanBeNull = true)]
protected BeatmapModelDownloader? Downloader { get; private set; }
private ArchiveDownloadRequest<IBeatmapSetInfo>? attachedRequest;
public BeatmapDownloadTracker(IBeatmapSetInfo trackedItem)
: base(trackedItem)
{
}
[BackgroundDependencyLoader(true)]
private void load()
{
if (Manager == null || Downloader == null)
return;
// Used to interact with manager classes that don't support interface types. Will eventually be replaced.
var beatmapSetInfo = new BeatmapSetInfo { OnlineID = TrackedItem.OnlineID };
if (Manager.IsAvailableLocally(beatmapSetInfo))
UpdateState(DownloadState.LocallyAvailable);
else
attachDownload(Downloader.GetExistingDownload(beatmapSetInfo));
Downloader.DownloadBegan += downloadBegan;
Downloader.DownloadFailed += downloadFailed;
Manager.ItemUpdated += itemUpdated;
Manager.ItemRemoved += itemRemoved;
}
private void downloadBegan(ArchiveDownloadRequest<IBeatmapSetInfo> request) => Schedule(() =>
{
if (checkEquality(request.Model, TrackedItem))
attachDownload(request);
});
private void downloadFailed(ArchiveDownloadRequest<IBeatmapSetInfo> request) => Schedule(() =>
{
if (checkEquality(request.Model, TrackedItem))
attachDownload(null);
});
private void attachDownload(ArchiveDownloadRequest<IBeatmapSetInfo>? request)
{
if (attachedRequest != null)
{
attachedRequest.Failure -= onRequestFailure;
attachedRequest.DownloadProgressed -= onRequestProgress;
attachedRequest.Success -= onRequestSuccess;
}
attachedRequest = request;
if (attachedRequest != null)
{
if (attachedRequest.Progress == 1)
{
UpdateProgress(1);
UpdateState(DownloadState.Importing);
}
else
{
UpdateProgress(attachedRequest.Progress);
UpdateState(DownloadState.Downloading);
attachedRequest.Failure += onRequestFailure;
attachedRequest.DownloadProgressed += onRequestProgress;
attachedRequest.Success += onRequestSuccess;
}
}
else
{
UpdateState(DownloadState.NotDownloaded);
}
}
private void onRequestSuccess(string _) => Schedule(() => UpdateState(DownloadState.Importing));
private void onRequestProgress(float progress) => Schedule(() => UpdateProgress(progress));
private void onRequestFailure(Exception e) => Schedule(() => attachDownload(null));
private void itemUpdated(BeatmapSetInfo item) => Schedule(() =>
{
if (checkEquality(item, TrackedItem))
UpdateState(DownloadState.LocallyAvailable);
});
private void itemRemoved(BeatmapSetInfo item) => Schedule(() =>
{
if (checkEquality(item, TrackedItem))
UpdateState(DownloadState.NotDownloaded);
});
private bool checkEquality(IBeatmapSetInfo x, IBeatmapSetInfo y) => x.OnlineID == y.OnlineID;
#region Disposal
protected override void Dispose(bool isDisposing)
{
base.Dispose(isDisposing);
attachDownload(null);
if (Downloader != null)
{
Downloader.DownloadBegan -= downloadBegan;
Downloader.DownloadFailed -= downloadFailed;
}
if (Manager != null)
{
Manager.ItemUpdated -= itemUpdated;
Manager.ItemRemoved -= itemRemoved;
}
}
#endregion
}
}