// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System.Security.Claims;

namespace Microsoft.AspNetCore.SignalR
{
    /// <summary>
    /// The default provider for getting the user ID from a connection.
    /// This provider gets the user ID from the connection's <see cref="HubConnectionContext.User"/> name identifier claim.
    /// </summary>
    public class DefaultUserIdProvider : IUserIdProvider
    {
        /// <inheritdoc />
        public virtual string GetUserId(HubConnectionContext connection)
        {
            return connection.User?.FindFirst(ClaimTypes.NameIdentifier)?.Value;
        }
    }
}