First commit

DiscordAPI/Helper/BackoffDelay.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+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);
+		}
+	}
+}