SharpRSS/SharpRss/Models/FeedModel.cs

using System.Threading.Tasks;
using CodeHollow.FeedReader;

namespace SharpRss.Models
{
    public class FeedModel
    {
        public FeedModel(string rssUrl)
        {
            _rssUrl = rssUrl;
            _fetchTask = FetchAsync();
        }
        private readonly Task _fetchTask;

        public async Task FetchAsync() => _feed = await FeedCache.GetFeed(_rssUrl);

        private Feed? _feed;
        public Feed Base {
            get
            {
                if (_feed == null)
                {
                    if (_fetchTask.IsFaulted)
                    { return new Feed(); }
                    if (_fetchTask.Status is not (TaskStatus.Running or TaskStatus.WaitingForActivation))
                        _fetchTask.Start();
                    _fetchTask.Wait();
                }
                return _feed ?? new Feed();
            }
        }
        private readonly string _rssUrl;
    }
}