SWRIS-HD/Converters/ConnectivityFaultToColorConverter.cs

using SWRIS.Models;
using System;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Media;

namespace SWRIS.Converters
{
    public class ConnectivityFaultToColorConverter : IMultiValueConverter
    {
        private static readonly Color OnlineColor = Color.FromRgb(0x00, 0xFF, 0x78);
        private static readonly Color OfflineColor = Color.FromRgb(0x78, 0x86, 0xB2);
        private static readonly Color FaultColor = Color.FromRgb(0xFF, 0x00, 0x00);

        private static readonly SolidColorBrush OnlineBrush;
        private static readonly SolidColorBrush OfflineBrush;
        private static readonly SolidColorBrush FaultBrush;

        static ConnectivityFaultToColorConverter()
        {
            OnlineBrush = new SolidColorBrush(OnlineColor);
            OfflineBrush = new SolidColorBrush(OfflineColor);
            FaultBrush = new SolidColorBrush(FaultColor);

            OnlineBrush.Freeze();
            OfflineBrush.Freeze();
            FaultBrush.Freeze();
        }

        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            if (values.Length < 3 ||
                !(values[0] is bool isConnected) ||
                !(values[1] is ObservableCollection<FaultDataModel> faults))
            {
                return OfflineBrush;
            }

            if (!isConnected)
                return OfflineBrush;

            if (faults != null && faults.Count > 0)
                return FaultBrush;

            return OnlineBrush;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}