Chat/ChatController/ChatKlassen/Contact.cs

using System;
using System.ComponentModel;
using System.Windows.Media;
using static System.String;

namespace ChatController.ChatKlassen
{
    public class Contact
    {
        public string Name { get; }

        private string _ReceivedMessage;
        public string ReceivedMessage
        {
            get
            {
                if (!IsNullOrEmpty(_ReceivedMessage) && _ReceivedMessage.Length > 25)
                {
                    return _ReceivedMessage.Substring(0, 25) + "...";
                }
                
                return _ReceivedMessage;
            }

            set
            {
                _ReceivedMessage = value;
                OnPropertyChanged(nameof(ReceivedMessage));
            }
        }

        private Brush _color;
        public Brush Color
        {
            get => _color;
            
            set
            {
                _color = value;
                OnPropertyChanged(nameof(Color));
            }
        }

        private int _NumberOfReadMessages;
        public int NumberOfReadMessages
        {
            get => _NumberOfReadMessages;

            set
            {
                _NumberOfReadMessages = value;
                    
                if (_NumberOfReadMessages == 1)
                {
                    _color = new BrushConverter().ConvertFromString("#ff5e00") as SolidColorBrush;
                }
                else 
                {
                    _color = new SolidColorBrush(Colors.Gray);
                }

                OnPropertyChanged(nameof(NumberOfReadMessages));
                OnPropertyChanged(nameof(Color));
            }
        }

        private Brush _ContactChatColor;
        public Brush ContactChatColor
        {
            get => _ContactChatColor;
            set
            {

                _ContactChatColor = value;
                OnPropertyChanged(nameof(ContactChatColor));
            }
        }

        public ImageSource Image { get; }
        public DateTime TimeStamp { get; set; }
        public long GroupId { get; set; }
        public long UserId { get; set; }
        public long? CustomerOid { get; set; }

        public Contact(string pName, ImageSource pImage, string pLastMessageText, DateTime pTimeStamp, long pGroupId,long? pCustomerOid, bool pOnlyEmployees, int pUserCount)
        {
            Name = pName;
            ReceivedMessage = pLastMessageText;
            Image = pImage;
            TimeStamp = pTimeStamp;
            GroupId = pGroupId;
            CustomerOid = pCustomerOid;
            NumberOfReadMessages = 1;
            
            if (CustomerOid != null)
            {
                _ContactChatColor = new BrushConverter().ConvertFromString("#3B7799") as SolidColorBrush;
            }
            else if (pOnlyEmployees && pUserCount > 2)
            {
                _ContactChatColor = new BrushConverter().ConvertFromString("#45993B") as SolidColorBrush;
            }
            else
            {
                _ContactChatColor = new BrushConverter().ConvertFromString("#000000") as SolidColorBrush;
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(string propertyName)
        {
            var handler = PropertyChanged;
            handler?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }      
    }
}