laatzen/LaaProductionWeb/LaaProductionWeb.Blazor/Components/Identity/Services/IdentityJwtService.cs

namespace LaaProductionWeb.Blazor.Components.Identity.Services
{
    using Microsoft.Extensions.Logging;

    using System;
    using System.Collections.Generic;
    using System.IdentityModel.Tokens.Jwt;
    using System.Security.Claims;

    public class IdentityJwtService(ILogger<IdentityJwtService> logger)
    {
        private readonly ILogger<IdentityJwtService> logger = logger;

        public IEnumerable<Claim> GetClaims(string token)
        {
            var claims = new List<Claim>();

            try
            {
                if (!string.IsNullOrWhiteSpace(token))
                {
                    var jwtSecurityTokenHandler = new JwtSecurityTokenHandler();
                    var securityToken = jwtSecurityTokenHandler.ReadToken(token);
                    var jwtSecurityToken = securityToken as JwtSecurityToken;

                    if (jwtSecurityToken.ValidTo <= DateTime.UtcNow)
                    {
                        claims.AddRange(jwtSecurityToken.Claims);
                    }
                }
            }
            catch (Exception e)
            {
                this.logger.LogError(e, e.Message);
            }

            if (claims.Count == 0)
            {
                claims.Add(new Claim(ClaimTypes.Role, "JustUser"));
            }

            return claims;
        }
    }
}