EnvelopeGenerator/EnvelopeGenerator.Web/Controllers/ControllerBaseExtensions.cs

using EnvelopeGenerator.Application.DTOs.EnvelopeReceiver;
using EnvelopeGenerator.Web.Models;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Mvc;
using System.Security.Claims;

namespace EnvelopeGenerator.Web.Controllers
{
    public static class ControllerBaseExtensions
    {
        #region Auth
        public static string? GetClaimValue(this ControllerBase controller, string claimType) => controller.User.FindFirstValue(claimType);

        public static string? GetAuthEnvelopeUuid(this ControllerBase controller) => controller.User.FindFirstValue(ClaimTypes.NameIdentifier);

        public static string? GetAuthReceiverSignature(this ControllerBase controller) => controller.User.FindFirstValue(ClaimTypes.Hash);

        public static string? GetAuthReceiverName(this ControllerBase controller) => controller.User.FindFirstValue(ClaimTypes.Name);

        public static string? GetAuthReceiverMail(this ControllerBase controller) => controller.User.FindFirstValue(ClaimTypes.Email);

        public static string? GetAuthEnvelopeTitle(this ControllerBase controller) => controller.User.FindFirstValue(EnvelopeClaimTypes.Title);

        public static int? GetAuthEnvelopeId(this ControllerBase controller)
        {
            var env_id_str = controller.User.FindFirstValue(EnvelopeClaimTypes.Id);
            return int.TryParse(env_id_str, out int env_id) ? env_id : null;
        }
        
        public static async Task SignInEnvelopeAsync(this HttpContext context, EnvelopeReceiverDto er, string receiverRole)
        {
            var claims = new List<Claim> {
            new(ClaimTypes.NameIdentifier, er.Envelope!.Uuid),
            new(ClaimTypes.Hash, er.Receiver!.Signature),
            new(ClaimTypes.Name, er.Name ?? string.Empty),
            new(ClaimTypes.Email, er.Receiver.EmailAddress),
            new(EnvelopeClaimTypes.Title, er.Envelope.Title),
            new(EnvelopeClaimTypes.Id, er.Envelope.Id.ToString()),
            new(ClaimTypes.Role, receiverRole)
        };

            var claimsIdentity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);

            var authProperties = new AuthenticationProperties
            {
                AllowRefresh = false,
                IsPersistent = false
            };

            await context.SignInAsync(
                CookieAuthenticationDefaults.AuthenticationScheme,
                new ClaimsPrincipal(claimsIdentity),
                authProperties);
        }
        #endregion

        #region View error
        //TODO: integrate localizer for ready-to-use views
        public static ViewResult ViewError(this Controller controller, ErrorViewModel errorViewModel) => controller.View("_Error", errorViewModel);

        public static ViewResult ViewError404(this Controller controller) => controller.ViewError(new()
        {
            Title = "404",
            Subtitle = "Die von Ihnen gesuchte Seite ist nicht verfügbar",
            Body = "Sie können derzeit nur an Sie gerichtete Briefe einsehen und unterschreiben.",
        });

        public static ViewResult ViewEnvelopeNotFound(this Controller controller) => controller.ViewError(new()
        {
            Title = "404",
            Subtitle = "Document not found",
            Body = "Wenn Sie diese URL in Ihrer E-Mail erhalten haben, wenden Sie sich bitte an das IT-Team."
        });

        public static ViewResult ViewDocumentNotFound(this Controller controller) => controller.ViewError(new()
        {
            Title = "404",
            Subtitle = "Umschlag nicht gefunden",
            Body = "Wenn Sie diese URL in Ihrer E-Mail erhalten haben, wenden Sie sich bitte an das IT-Team."
        });

		public static ViewResult ViewAccessCodeNotSent(this Controller controller) => controller.ViewError(new()
		{
			Title = "500",
			Subtitle = "Der Zugangscode konnte nicht gesendet werden",
			Body = "Bitte kontaktieren Sie das IT-Team."
		});

		public static ViewResult ViewInnerServiceError(this Controller controller) => controller.ViewError(new()
        {
            Title = "500",
            Subtitle = "Ein unerwarteter Fehler ist aufgetreten",
            Body = "Bitte kontaktieren Sie das IT-Team."
        });
        #endregion
    }
}