prs/prs.mobile/comal.timesheets/Equipment/EquipmentListDataModel.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Comal.Classes;
using InABox.Core;
using Xamarin.Forms;

namespace comal.timesheets
{
    public class EquipmentListDataModel : ListDataModel<Equipment, EquipmentListDataModelItem>
    {

        public override Columns<Equipment> Columns => new Columns<Equipment>(x => x.ID)
            .Add(x => x.Code)
            .Add(x => x.Description)
            .Add(x => x.GroupLink.ID)
            .Add(x => x.GroupLink.Description)
            .Add(x=>x.TrackerLink.BatteryLevel)
            .Add(x => x.GroupLink.Thumbnail.ID)
            .Add(x=>x.TrackerLink.Location.Timestamp);

        public EquipmentListDataModel() : base()
        {
            Images = new Dictionary<Guid, ImageSource>() { { Guid.Empty, null } };
        }
        
        public override void BeforeLoad(MultiQuery query, Filter<Equipment> filter)
        {
            base.BeforeLoad(query, filter);

            query.Add<Document>(
                //new Filter<Document>(x => x.ID).InQuery<Equipment>(filter, x => x.GroupLink.Thumbnail.ID),
                new Filter<Document>(x => x.ID).InQuery<Equipment>(filter, x => x.GroupLink.ID),
                new Columns<Document>(x => x.ID, x => x.Data)
                );
        }

        public String[] GroupNames => Items.Select(x => x.GroupName).Distinct().OrderBy(x => x).Prepend("All").ToArray();
        
        public Dictionary<Guid, ImageSource> Images { get; private set; }
        
        public override void AfterLoad(MultiQuery query, Filter<Equipment> filter)
        {
            base.AfterLoad(query, filter);
            
            Images.Clear();
            CoreTable docs = query.Get<Document>();
            foreach (var row in docs.Rows)
            {
                Guid imgid = row.Get<Document, Guid>(c => c.ID);
                byte[] imgdata = row.Get<Document, byte[]>(c => c.Data);
                ImageSource imgsource = ImageSource.FromStream(() => new MemoryStream(imgdata));
                Images[imgid] = imgsource;
            }
        }
    }
    
    public class EquipmentListDataModelItem : CoreDataModelItem
    {
        public Guid ID => Row.Get<Equipment, Guid>(x => x.ID); 
        public string Code => Row.Get<Equipment, String>(x => x.Code); 
        public string Description => Row.Get<Equipment, String>(x => x.Description); 
        public Guid GroupID => Row.Get<Equipment, Guid>(x => x.GroupLink.ID);
        public string GroupName => Row.Get<Equipment, String>(x => x.GroupLink.Description);
        public double BatteryDouble => Row.Get<Equipment, double>(x => x.TrackerLink.BatteryLevel); 
        public DateTime LastUpdate => Row.Get<Equipment, DateTime>(x => x.TrackerLink.Location.Timestamp); 
        
        public ImageSource ImageSource
        {
            get
            {
                (Parent as EquipmentListDataModel).Images.TryGetValue(GroupID, out ImageSource img);
                return img;
            }
        }

        public double ColumnWidth => (Parent as EquipmentListDataModel).Images.Any() ? 55 : 0;
        
        public string Battery => $"Battery {BatteryDouble:F2}";
        
        public string BatteryLastUpdate => $"Last Update: {LastUpdate:dd MMM yy}";

        public Color LastUpdateColour => LastUpdate < DateTime.Today.AddMonths(-1)
            ? Color.FromHex("#f08080")
            : LastUpdate < DateTime.Today.AddDays(-14)
                ? Color.FromHex("#ffef00")
                : Color.LightGreen;
        
        public double BatteryRowHeight => BatteryDouble > 0 ? 25 : 0;
        
        public Color BatteryColour => BatteryDouble <= 40D
            ? Color.FromHex("#f08080")
            : BatteryDouble > 40D && BatteryDouble <= 70D
                ? Color.FromHex("#ffef00")
                : Color.LightGreen;
        
        
    }
    
}