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osu-lazer/osu.Game/Database/IModelManager.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.
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#nullable disable
using System.Collections.Generic;
namespace osu.Game.Database
{
/// <summary>
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/// Represents a model manager that publishes events when <typeparamref name="TModel"/>s are added or removed.
/// </summary>
/// <typeparam name="TModel">The model type.</typeparam>
public interface IModelManager<TModel>
where TModel : class
{
/// <summary>
/// Delete an item from the manager.
/// Is a no-op for already deleted items.
/// </summary>
/// <param name="item">The item to delete.</param>
/// <returns>false if no operation was performed</returns>
bool Delete(TModel item);
/// <summary>
/// Delete multiple items.
/// This will post notifications tracking progress.
/// </summary>
void Delete(List<TModel> items, bool silent = false);
/// <summary>
/// Restore multiple items that were previously deleted.
/// This will post notifications tracking progress.
/// </summary>
void Undelete(List<TModel> items, bool silent = false);
/// <summary>
/// Restore an item that was previously deleted. Is a no-op if the item is not in a deleted state, or has its protected flag set.
/// </summary>
/// <param name="item">The item to restore</param>
void Undelete(TModel item);
/// <summary>
/// Checks whether a given <typeparamref name="TModel"/> is already available in the local store.
/// </summary>
/// <param name="model">The <typeparamref name="TModel"/> whose existence needs to be checked.</param>
/// <returns>Whether the <typeparamref name="TModel"/> exists.</returns>
bool IsAvailableLocally(TModel model);
}
}