AgeAuthenticator.cs

using Paiwise;
using System;
using System.Threading.Tasks;
using Waher.Content;
using Waher.Runtime.Inventory;
 
namespace Waher.Service.IoTBroker.Legal.Identity.Age
{
    public class AgeAuthenticator : IIdentityAuthenticatorService
    {
        public AgeAuthenticator()
        {
        }
 
        public Task Start()
        {
            return Task.CompletedTask;
        }
 
        public Task Stop()
        {
            return Task.CompletedTask;
        }
 
        public Grade Supports(IIdentityApplication Application)
        {
            PersonalInformation PI = Application.PersonalInformation;
 
            if (PI.BirthDate.HasValue && PI.AgeAbove.HasValue)
                return Grade.Perfect;
            else
                return Grade.NotAtAll;
        }
 
        public Task Validate(IIdentityApplication Application)
        {
            try
            {
                PersonalInformation PI = Application.PersonalInformation;
                DateTime Now = DateTime.Now;
 
                if (!PI.BirthDate.HasValue || !PI.AgeAbove.HasValue)
                    return Task.CompletedTask;
 
                if (PI.BirthDate.Value > Now)
                {
                    Application.ClaimInvalid(PersonalInformation.BirthDayTag, "Birth date is in the future.", "en", "FutureBirthDate", this);
                    Application.ClaimInvalid(PersonalInformation.BirthMonthTag, "Birth date is in the future.", "en", "FutureBirthDate", this);
                    Application.ClaimInvalid(PersonalInformation.BirthYearTag, "Birth date is in the future.", "en", "FutureBirthDate", this);
                    return Task.CompletedTask;
                }
 
                Duration D = Duration.GetDurationBetween(PI.BirthDate.Value, Now);
 
                if (D.Years < PI.AgeAbove.Value)
                {
                    Application.ClaimInvalid(PersonalInformation.AgeAboveTag, "Age only above " + D.Years.ToString(), "en", "AgeNotReached", this);
                    return Task.CompletedTask;
                }
 
                Application.ClaimValid(PersonalInformation.AgeAboveTag, this);
            }
            catch (Exception ex)
            {
                Application.ReportError(ex.Message, string.Empty, string.Empty,
                    ValidationErrorType.Service, this);
            }
 
            return Task.CompletedTask;
        }
    }
}