EnvelopeGenerator/EnvelopeGenerator.Web/Controllers/ControllerBaseExtensions.cs

using Microsoft.AspNetCore.Mvc;
using System.Security.Claims;

namespace EnvelopeGenerator.Web.Controllers
{
    public static class ControllerBaseExtensions
    {
        public static (string EnvelopeUuid, string ReceiverSignature)? GetAuthenticatedEnvelopeDetails(this ControllerBase controller)
        {
            if(controller?.User?.Identity?.IsAuthenticated ?? false)
            {
                var envelopeUuid = controller.User.FindFirst(ClaimTypes.NameIdentifier)?.Value;
                var receiverSignature = controller.User.FindFirst(ClaimTypes.Hash)?.Value;
                if (!string.IsNullOrEmpty(envelopeUuid) && !string.IsNullOrEmpty(receiverSignature))
                    return (EnvelopeUuid: envelopeUuid, ReceiverSignature: receiverSignature);
            }
            return null;
        }

        public static string? GetAuthenticatedEnvelopeUuid(this ControllerBase controller)
        {
            if (controller?.User?.Identity?.IsAuthenticated ?? false)
            {
                var envelopeUuid = controller.User.FindFirst(ClaimTypes.NameIdentifier)?.Value;
                if (!string.IsNullOrEmpty(envelopeUuid))
                    return envelopeUuid;
            }
            return null;
        }

        public static string? GetAuthenticatedReceiverSignature(this ControllerBase controller)
        {
            if (controller?.User?.Identity?.IsAuthenticated ?? false)
            {
                var receiverSignature = controller.User.FindFirst(ClaimTypes.Hash)?.Value;
                if (!string.IsNullOrEmpty(receiverSignature))
                    return receiverSignature;
            }
            return null;
        }
    }
}