winmr-api/Utils/LazyConcurrentContainer.cs

/* This software is licensed by the MIT License, see LICENSE file */
/*                           Copyright © 2024-2025 Gregory Lirent */

using System.Collections.Concurrent;

namespace WebmrAPI.Utils
{
    public class LazyConcurrentContainer<T> : ConcurrentObject
    {
        private DateTime _lastScan = DateTime.MinValue;
        private DateTime _currentScan = DateTime.MinValue;
        private ConcurrentDictionary<long, T>? _container;

        public DateTime LastUpdate
        {
            get => LockedGet(ref _lastScan);
        }

        public TimeSpan Elapsed
        {
            get { lock (_lock) return _currentScan - _lastScan; }
        }

        public ConcurrentDictionary<long, T>? Container
        {
            get => LockedGet(ref _container);
            set
            {
                lock (_lock)
                {
                    _lastScan = _currentScan;
                    _currentScan = DateTime.UtcNow;
                    _container = value;
                }
            }
        }

        public IEnumerable<T>? Values
        {
            get => _container?.Values.ToList();
        }

        public void SetContainer(Dictionary<long, T>? container)
        {
            Container = container != null ? new ConcurrentDictionary<long, T>(container) : null;
        }
        public void SetContainer(ConcurrentDictionary<long, T> container)
        {
            Container = container != null ? new ConcurrentDictionary<long, T>(container) : null;
        }
        public void CleanContainer()
        {
            Container = null;
        }
    }
}