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osu-lazer/osu.Game/Database/IModelDownloader.cs
2022-06-17 16:37:17 +09:00

46 lines
2.0 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.
#nullable disable
using System;
using osu.Game.Online.API;
namespace osu.Game.Database
{
/// <summary>
/// Represents a <see cref="IModelManager{TModel}"/> that can download new models from an external source.
/// </summary>
/// <typeparam name="T">The item's interface type.</typeparam>
public interface IModelDownloader<T> : IPostNotifications
where T : class
{
/// <summary>
/// Fired when a <typeparamref name="T"/> download begins.
/// This is NOT run on the update thread and should be scheduled.
/// </summary>
event Action<ArchiveDownloadRequest<T>> DownloadBegan;
/// <summary>
/// Fired when a <typeparamref name="T"/> download is interrupted, either due to user cancellation or failure.
/// This is NOT run on the update thread and should be scheduled.
/// </summary>
event Action<ArchiveDownloadRequest<T>> DownloadFailed;
/// <summary>
/// Begin a download for the requested <typeparamref name="T"/>.
/// </summary>
/// <param name="item">The <stypeparamref name="T"/> 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>
bool Download(T item, bool minimiseDownloadSize);
/// <summary>
/// Gets an existing <typeparamref name="T"/> download request if it exists.
/// </summary>
/// <param name="item">The <typeparamref name="T"/> whose request is wanted.</param>
/// <returns>The <see cref="ArchiveDownloadRequest{T}"/> object if it exists, otherwise null.</returns>
ArchiveDownloadRequest<T> GetExistingDownload(T item);
}
}