prs/prs.mobile.new/PRS.Mobile/Components/DigitalForms/Editor/Views/DigitalFormEmbeddedMediaValues.cs

using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace PRS.Mobile
{
    public class DigitalFormEmbeddedMediaValues : IEnumerable<DigitalFormEmbeddedMediaValue>, INotifyPropertyChanged
    {
        private readonly List<DigitalFormEmbeddedMediaValue> _values = new();

        public DigitalFormEmbeddedMediaValue[] Values => _values.ToArray();
        
        public IEnumerator<DigitalFormEmbeddedMediaValue> GetEnumerator() => _values.GetEnumerator();

        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();

        public void Add(DigitalFormEmbeddedMediaValue value)
        {
            _values.Add(value);
            OnPropertyChanged(nameof(Values));
        }

        public void Remove(DigitalFormEmbeddedMediaValue value)
        {
            if (_values.Contains(value))
            {
                _values.Remove(value);
                OnPropertyChanged(nameof(Values));
            }
        }

        public void Clear()
        {
            _values.Clear();
            OnPropertyChanged(nameof(Values));
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        protected bool SetField<T>(ref T field, T value, [CallerMemberName] string propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(field, value)) return false;
            field = value;
            OnPropertyChanged(propertyName);
            return true;
        }
    }
}