From 1f7819e53607afa2dd6ea004966ae5d84c2fa40c Mon Sep 17 00:00:00 2001
From: Jeffery Thompson <jeffery.thompson@wedoresi.com>
Date: Thu, 12 Jul 2018 14:03:15 -0400
Subject: [PATCH] feat: add DateTimeExtensions.PreviousLatestTime

---
 .../Extensions/DateTimeExtensions.cs            | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/ICD.Common.Utils/Extensions/DateTimeExtensions.cs b/ICD.Common.Utils/Extensions/DateTimeExtensions.cs
index 77f0b14..8a95078 100644
--- a/ICD.Common.Utils/Extensions/DateTimeExtensions.cs
+++ b/ICD.Common.Utils/Extensions/DateTimeExtensions.cs
@@ -46,5 +46,22 @@ namespace ICD.Common.Utils.Extensions
 			var time = orderedTimes.FirstOrDefault(dt => target < dt);
 			return time == default(DateTime) ? (DateTime?) null : time;
 		}
+
+		/// <summary>
+		/// Returns the closest DateTime to the target time that is less than the target time
+		/// </summary>
+		/// <param name="target"></param>
+		/// <param name="a"></param>
+		/// <param name="b"></param>
+		/// <returns></returns>
+		public static DateTime? PreviousLatestTime(this DateTime target, params DateTime[] times)
+		{
+			if (times.Length == 0)
+				return null;
+
+			DateTime[] orderedTimes = times.OrderByDescending(dt => dt).ToArray();
+			var time = orderedTimes.FirstOrDefault(dt => target > dt);
+			return time == default(DateTime) ? (DateTime?) null : time;
+		}
 	}
 }