openiddict-core/src/OpenIddict.Client.DataProtection/OpenIddictClientDataProtectionConfiguration.cs

/*
 * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
 * See https://github.com/openiddict/openiddict-core for more information concerning
 * the license and the contributors participating to this project.
 */

using Microsoft.AspNetCore.DataProtection;
using Microsoft.Extensions.Options;

namespace OpenIddict.Client.DataProtection;

/// <summary>
/// Contains the methods required to ensure that the OpenIddict ASP.NET Core Data Protection configuration is valid.
/// </summary>
public class OpenIddictClientDataProtectionConfiguration : IConfigureOptions<OpenIddictClientOptions>,
                                                           IPostConfigureOptions<OpenIddictClientDataProtectionOptions>
{
    private readonly IDataProtectionProvider _dataProtectionProvider;

    /// <summary>
    /// Creates a new instance of the <see cref="OpenIddictClientDataProtectionConfiguration"/> class.
    /// </summary>
    /// <param name="dataProtectionProvider">The ASP.NET Core Data Protection provider.</param>
    public OpenIddictClientDataProtectionConfiguration(IDataProtectionProvider dataProtectionProvider)
        => _dataProtectionProvider = dataProtectionProvider;

    public void Configure(OpenIddictClientOptions options)
    {
        if (options is null)
        {
            throw new ArgumentNullException(nameof(options));
        }

        // Register the built-in event handlers used by the OpenIddict Data Protection server components.
        options.Handlers.AddRange(OpenIddictClientDataProtectionHandlers.DefaultHandlers);
    }

    /// <summary>
    /// Populates the default OpenIddict ASP.NET Core Data Protection server options
    /// and ensures that the configuration is in a consistent and valid state.
    /// </summary>
    /// <param name="name">The name of the options instance to configure, if applicable.</param>
    /// <param name="options">The options instance to initialize.</param>
    public void PostConfigure(string name, OpenIddictClientDataProtectionOptions options)
    {
        if (options is null)
        {
            throw new ArgumentNullException(nameof(options));
        }

        options.DataProtectionProvider ??= _dataProtectionProvider;
    }
}