klhztrader/KLHZ.Trader.Core.Math/Declisions/Dtos/TimeWindowCacheItem.cs

using KLHZ.Trader.Core.Contracts.Declisions.Dtos;
using KLHZ.Trader.Core.Contracts.Declisions.Dtos.Enums;

namespace KLHZ.Trader.Core.Math.Declisions.Dtos
{
    internal class TimeWindowCacheItem
    {
        private readonly object _locker = new();
        private readonly LinkedList<CachedValue> _cachedValues = new();

        public readonly TimeSpan WindowSize;
        public readonly string Key;

        public TimeWindowCacheItem(string key, TimeWindowCacheType window)
        {
            Key = key;
            WindowSize = GetTimeSpan(window);
        }

        public ValueTask AddData(CachedValue cachedValue)
        {
            lock (_locker)
            {
                _cachedValues.AddLast(cachedValue);
                while (_cachedValues.Last != null && _cachedValues.First != null
                    && _cachedValues.Last.Value.Time - _cachedValues.First.Value.Time > WindowSize)
                {
                    _cachedValues.RemoveFirst();
                }
            }
            return ValueTask.CompletedTask;
        }

        public ValueTask<CachedValue[]> GetValues()
        {
            lock (_locker)
            {
                return ValueTask.FromResult(_cachedValues.ToArray());
            }
        }

        private static TimeSpan GetTimeSpan(TimeWindowCacheType type)
        {
            switch (type)
            {
                case TimeWindowCacheType._5_Minutes:
                    {
                        return TimeSpan.FromMinutes(5);
                    }
                case TimeWindowCacheType._15_Minutes:
                    {
                        return TimeSpan.FromMinutes(15);
                    }
                case TimeWindowCacheType._20_Seconds:
                    {
                        return TimeSpan.FromSeconds(20);
                    }
                default:
                    {
                        return TimeSpan.FromMinutes(1);
                    }
            }
        }
    }
}