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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
namespace Microsoft.AspNetCore.Mvc.Controllers;
/// <summary>
/// Provides methods to create a MVC controller.
/// </summary>
public interface IControllerActivatorProvider
{
/// <summary>
/// Creates a <see cref="Func{T, TResult}"/> that creates a controller.
/// </summary>
/// <param name="descriptor">The <see cref="ControllerActionDescriptor"/>.</param>
/// <returns>The delegate used to activate the controller.</returns>
Func<ControllerContext, object> CreateActivator(ControllerActionDescriptor descriptor);
/// <summary>
/// Creates an <see cref="Action"/> that releases a controller.
/// </summary>
/// <param name="descriptor">The <see cref="ControllerActionDescriptor"/>.</param>
/// <returns>The delegate used to dispose the activated controller.</returns>
Action<ControllerContext, object>? CreateReleaser(ControllerActionDescriptor descriptor);
/// <summary>
/// Creates an <see cref="Action"/> that releases a controller.
/// </summary>
/// <param name="descriptor">The <see cref="ControllerActionDescriptor"/>.</param>
/// <returns>The delegate used to dispose the activated controller.</returns>
Func<ControllerContext, object, ValueTask>? CreateAsyncReleaser(ControllerActionDescriptor descriptor)
{
var releaser = CreateReleaser(descriptor);
if (releaser is null)
{
return static (_, _) => default;
}
return (context, controller) =>
{
releaser.Invoke(context, controller);
return default;
};
}
}
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