SDR-RPC/SDR-RPC/DiscordAPI/Helper/BackoffDelay.cs

using System;

namespace DiscordRPC.Helper
{
    internal class BackoffDelay
    {
        /// <summary>
        /// The maximum time the backoff can reach
        /// </summary>
        public int Maximum { get; private set; }

        /// <summary>
        /// The minimum time the backoff can start at
        /// </summary>
        public int Minimum { get; private set; }

        /// <summary>
        /// The current time of the backoff
        /// </summary>
        public int Current
        { get { return _current; } }

        private int _current;

        /// <summary>
        /// The current number of failures
        /// </summary>
        public int Fails
        { get { return _fails; } }

        private int _fails;

        /// <summary>
        /// The random generator
        /// </summary>
        public Random Random { get; set; }

        private BackoffDelay()
        { }

        public BackoffDelay(int min, int max) : this(min, max, new Random())
        {
        }

        public BackoffDelay(int min, int max, Random random)
        {
            this.Minimum = min;
            this.Maximum = max;

            this._current = min;
            this._fails = 0;
            this.Random = random;
        }

        /// <summary>
        /// Resets the backoff
        /// </summary>
        public void Reset()
        {
            _fails = 0;
            _current = Minimum;
        }

        public int NextDelay()
        {
            //Increment the failures
            _fails++;

            double diff = (Maximum - Minimum) / 100f;
            _current = (int)Math.Floor(diff * _fails) + Minimum;

            return Math.Min(Math.Max(_current, Minimum), Maximum);
        }
    }
}