prs/prs.mobile.new/PRS.Mobile/Data Models/Lists/EmployeeQualification/EmployeeQualificationModel.cs

using System;
using System.Linq;
using System.Linq.Expressions;
using InABox.Mobile;
using Comal.Classes;
using InABox.Core;

namespace PRS.Mobile
{
    public class EmployeeQualificationModel : CoreRepository<EmployeeQualificationModel, EmployeeQualificationShell,
        EmployeeQualification>
    {
        public EmployeeQualificationModel(IModelHost host, Func<Filter<EmployeeQualification>> filter): base(host, filter)
        {
        }

        protected override Expression<Func<EmployeeQualification, object>> ImageColumn => x => x.FrontPhoto.ID;

        public int NeedsAttention => Items.Count(x =>
            x.Qualified.IsEmpty()
            || x.Expiry < DateTime.Today
            || x.FrontPhotoID == Guid.Empty
        );
    }
}