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osu-lazer/osu.Game/Database/DownloadableArchiveModelManager.cs
2020-05-19 16:44:22 +09:00

156 lines
7.0 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 Humanizer;
using osu.Framework.Logging;
using osu.Framework.Platform;
using osu.Game.Online.API;
using osu.Game.Overlays.Notifications;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using osu.Framework.Bindables;
namespace osu.Game.Database
{
/// <summary>
/// An <see cref="ArchiveModelManager{TModel, TFileModel}"/> that has the ability to download models using an <see cref="IAPIProvider"/> and
/// import them into the store.
/// </summary>
/// <typeparam name="TModel">The model type.</typeparam>
/// <typeparam name="TFileModel">The associated file join type.</typeparam>
public abstract class DownloadableArchiveModelManager<TModel, TFileModel> : ArchiveModelManager<TModel, TFileModel>, IModelDownloader<TModel>
where TModel : class, IHasFiles<TFileModel>, IHasPrimaryKey, ISoftDelete, IEquatable<TModel>
where TFileModel : class, INamedFileInfo, new()
{
public IBindable<WeakReference<ArchiveDownloadRequest<TModel>>> DownloadBegan => downloadBegan;
private readonly Bindable<WeakReference<ArchiveDownloadRequest<TModel>>> downloadBegan = new Bindable<WeakReference<ArchiveDownloadRequest<TModel>>>();
public IBindable<WeakReference<ArchiveDownloadRequest<TModel>>> DownloadFailed => downloadFailed;
private readonly Bindable<WeakReference<ArchiveDownloadRequest<TModel>>> downloadFailed = new Bindable<WeakReference<ArchiveDownloadRequest<TModel>>>();
private readonly IAPIProvider api;
private readonly List<ArchiveDownloadRequest<TModel>> currentDownloads = new List<ArchiveDownloadRequest<TModel>>();
private readonly MutableDatabaseBackedStoreWithFileIncludes<TModel, TFileModel> modelStore;
protected DownloadableArchiveModelManager(Storage storage, IDatabaseContextFactory contextFactory, IAPIProvider api, MutableDatabaseBackedStoreWithFileIncludes<TModel, TFileModel> modelStore,
IIpcHost importHost = null)
: base(storage, contextFactory, modelStore, importHost)
{
this.api = api;
this.modelStore = modelStore;
}
/// <summary>
/// Creates the download request for this <typeparamref name="TModel"/>.
/// </summary>
/// <param name="model">The <typeparamref name="TModel"/> to be downloaded.</param>
/// <param name="minimiseDownloadSize">Whether this download should be optimised for slow connections. Generally means extras are not included in the download bundle.</param>
/// <returns>The request object.</returns>
protected abstract ArchiveDownloadRequest<TModel> CreateDownloadRequest(TModel model, bool minimiseDownloadSize);
/// <summary>
/// Begin a download for the requested <typeparamref name="TModel"/>.
/// </summary>
/// <param name="model">The <typeparamref name="TModel"/> to be downloaded.</param>
/// <param name="minimiseDownloadSize">Whether this download should be optimised for slow connections. Generally means extras are not included in the download bundle.</param>
/// <returns>Whether the download was started.</returns>
public bool Download(TModel model, bool minimiseDownloadSize = false)
{
if (!canDownload(model)) return false;
var request = CreateDownloadRequest(model, minimiseDownloadSize);
DownloadNotification notification = new DownloadNotification
{
Text = $"Downloading {request.Model}",
};
request.DownloadProgressed += progress =>
{
notification.State = ProgressNotificationState.Active;
notification.Progress = progress;
};
request.Success += filename =>
{
Task.Factory.StartNew(async () =>
{
// This gets scheduled back to the update thread, but we want the import to run in the background.
var imported = await Import(notification, filename);
// for now a failed import will be marked as a failed download for simplicity.
if (!imported.Any())
downloadFailed.Value = new WeakReference<ArchiveDownloadRequest<TModel>>(request);
currentDownloads.Remove(request);
}, TaskCreationOptions.LongRunning);
};
request.Failure += triggerFailure;
notification.CancelRequested += () =>
{
request.Cancel();
return true;
};
currentDownloads.Add(request);
PostNotification?.Invoke(notification);
api.PerformAsync(request);
downloadBegan.Value = new WeakReference<ArchiveDownloadRequest<TModel>>(request);
return true;
void triggerFailure(Exception error)
{
currentDownloads.Remove(request);
downloadFailed.Value = new WeakReference<ArchiveDownloadRequest<TModel>>(request);
notification.State = ProgressNotificationState.Cancelled;
if (!(error is OperationCanceledException))
Logger.Error(error, $"{HumanisedModelName.Titleize()} download failed!");
}
}
public bool IsAvailableLocally(TModel model) => CheckLocalAvailability(model, modelStore.ConsumableItems.Where(m => !m.DeletePending));
/// <summary>
/// Performs implementation specific comparisons to determine whether a given model is present in the local store.
/// </summary>
/// <param name="model">The <typeparamref name="TModel"/> whose existence needs to be checked.</param>
/// <param name="items">The usable items present in the store.</param>
/// <returns>Whether the <typeparamref name="TModel"/> exists.</returns>
protected virtual bool CheckLocalAvailability(TModel model, IQueryable<TModel> items)
=> model.ID > 0 && items.Any(i => i.ID == model.ID && i.Files.Any());
public ArchiveDownloadRequest<TModel> GetExistingDownload(TModel model) => currentDownloads.Find(r => r.Model.Equals(model));
private bool canDownload(TModel model) => GetExistingDownload(model) == null && api != null;
private class DownloadNotification : ProgressNotification
{
public override bool IsImportant => false;
protected override Notification CreateCompletionNotification() => new SilencedProgressCompletionNotification
{
Activated = CompletionClickAction,
Text = CompletionText
};
private class SilencedProgressCompletionNotification : ProgressCompletionNotification
{
public override bool IsImportant => false;
}
}
}
}