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88 lines
3.2 KiB
C#
88 lines
3.2 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Threading.Tasks;
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using osu.Game.IO;
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namespace osu.Game.Database
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{
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/// <summary>
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/// Represents a model manager that publishes events when <typeparamref name="TModel"/>s are added or removed.
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/// </summary>
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/// <typeparam name="TModel">The model type.</typeparam>
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public interface IModelManager<TModel>
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where TModel : class
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{
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/// <summary>
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/// Fired when an item is updated.
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/// </summary>
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event Action<TModel> ItemUpdated;
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/// <summary>
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/// Fired when an item is removed.
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/// </summary>
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event Action<TModel> ItemRemoved;
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/// <summary>
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/// This is a temporary method and will likely be replaced by a full-fledged (and more correctly placed) migration process in the future.
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/// </summary>
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Task ImportFromStableAsync(StableStorage stableStorage);
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/// <summary>
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/// Exports an item to a legacy (.zip based) package.
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/// </summary>
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/// <param name="item">The item to export.</param>
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void Export(TModel item);
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/// <summary>
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/// Exports an item to the given output stream.
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/// </summary>
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/// <param name="model">The item to export.</param>
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/// <param name="outputStream">The output stream to export to.</param>
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void ExportModelTo(TModel model, Stream outputStream);
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/// <summary>
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/// Perform an update of the specified item.
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/// TODO: Support file additions/removals.
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/// </summary>
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/// <param name="item">The item to update.</param>
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void Update(TModel item);
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/// <summary>
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/// Delete an item from the manager.
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/// Is a no-op for already deleted items.
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/// </summary>
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/// <param name="item">The item to delete.</param>
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/// <returns>false if no operation was performed</returns>
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bool Delete(TModel item);
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/// <summary>
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/// Delete multiple items.
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/// This will post notifications tracking progress.
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/// </summary>
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void Delete(List<TModel> items, bool silent = false);
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/// <summary>
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/// Restore multiple items that were previously deleted.
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/// This will post notifications tracking progress.
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/// </summary>
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void Undelete(List<TModel> items, bool silent = false);
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/// <summary>
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/// 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.
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/// </summary>
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/// <param name="item">The item to restore</param>
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void Undelete(TModel item);
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/// <summary>
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/// Checks whether a given <typeparamref name="TModel"/> is already available in the local store.
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/// </summary>
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/// <param name="model">The <typeparamref name="TModel"/> whose existence needs to be checked.</param>
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/// <returns>Whether the <typeparamref name="TModel"/> exists.</returns>
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bool IsAvailableLocally(TModel model);
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}
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}
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