prs/prs.mobile.new/PRS.Mobile/Modules/Assignments/Edit/AssignmentEditViewModel.cs

using System;
using System.Threading.Tasks;
using Comal.Classes;
using InABox.Core;
using InABox.Mobile;
using Point = Xamarin.Forms.Point;

namespace PRS.Mobile
{

    public class AssignmentEditViewModel : MobileViewModel<Assignment, AssignmentShell>
    {
        protected override void DoLoad()
        {
            Task[] tasks = new Task[]
            {
                Task.Run(() => Forms.Refresh(true)),
                Task.Run(() => Documents.Refresh(true))
            };
            Task.WaitAll(tasks);
        }

        public Point Coordinates =>
            Item == null
                ? new Point()
                : new Point
                    (
                        Item.Longitude,
                        Item.Latitude
                    );
        
        public AssignmentFormModel Forms { get; private set; }
        
        public AssignmentDocumentModel Documents { get; private set; }

        public AssignmentEditViewModel()
        {
            Forms = new AssignmentFormModel(App.Data,
                () => new Filter<AssignmentForm>(x => x.Parent.ID).IsEqualTo(Item?.ID ?? CoreUtils.FullGuid)
            );
            
            Documents = new AssignmentDocumentModel(App.Data,
                () => new Filter<AssignmentDocument>(x => x.EntityLink.ID).IsEqualTo(Item?.ID ?? CoreUtils.FullGuid)
            );
        }
        
        public override bool IsChanged => Item == null || Item.ID == Guid.Empty || Item.IsChanged();
        
    }
}