// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.IO;
using System.Threading;
using System.Threading.Tasks;
 
namespace Microsoft.CodeAnalysis.Host;
 
/// <remarks>
/// Instances of <see cref="IPersistentStorage"/> support both synchronous and asynchronous disposal.  Asynchronous
/// disposal should always be preferred as the implementation of synchronous disposal may end up blocking the caller
/// on async work.
/// </remarks>
public interface IPersistentStorage
{
    Task<Stream?> ReadStreamAsync(string name, CancellationToken cancellationToken = default);
    Task<Stream?> ReadStreamAsync(Project project, string name, CancellationToken cancellationToken = default);
    Task<Stream?> ReadStreamAsync(Document document, string name, CancellationToken cancellationToken = default);
 
    /// <summary>
    /// Returns <see langword="true"/> if the data was successfully persisted to the storage subsystem.  Subsequent
    /// calls to read the same keys should succeed if called within the same session.
    /// </summary>
    Task<bool> WriteStreamAsync(string name, Stream stream, CancellationToken cancellationToken = default);
 
    /// <summary>
    /// Returns <see langword="true"/> if the data was successfully persisted to the storage subsystem.  Subsequent
    /// calls to read the same keys should succeed if called within the same session.
    /// </summary>
    Task<bool> WriteStreamAsync(Project project, string name, Stream stream, CancellationToken cancellationToken = default);
 
    /// <summary>
    /// Returns <see langword="true"/> if the data was successfully persisted to the storage subsystem.  Subsequent
    /// calls to read the same keys should succeed if called within the same session.
    /// </summary>
    Task<bool> WriteStreamAsync(Document document, string name, Stream stream, CancellationToken cancellationToken = default);
}