using Realms;
using System.Collections.ObjectModel;
using System.Collections.Specialized;

namespace FeedCenter.Data;

public class RealmObservableCollection<T> : ObservableCollection<T> where T : IRealmObject
{
    private readonly Realm _realm;

    public RealmObservableCollection(Realm realm) : base(realm.All<T>())
    {
        _realm = realm;
    }

    protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
    {
        if (e.OldItems != null)
            foreach (T item in e.OldItems)
                _realm.Remove(item);

        if (e.NewItems != null)
            foreach (T item in e.NewItems)
                _realm.Add(item);

        base.OnCollectionChanged(e);
    }
}