New: Search for previously aired episodes that were just added to the database

src/NzbDrone.Common/Extensions/DateTimeExtensions.cs

@@ -0,0 +1,42 @@
+using System;
+
+namespace NzbDrone.Common.Extensions
+{
+    public static class DateTimeExtensions
+    {
+        public static bool InNextDays(this DateTime dateTime, int days)
+        {
+            return InNext(dateTime, new TimeSpan(days, 0, 0, 0));
+        }
+
+        public static bool InLastDays(this DateTime dateTime, int days)
+        {
+            return InLast(dateTime, new TimeSpan(days, 0, 0, 0));
+        }
+
+        public static bool InNext(this DateTime dateTime, TimeSpan timeSpan)
+        {
+            return dateTime >= DateTime.UtcNow && dateTime <= DateTime.UtcNow.Add(timeSpan);
+        }
+
+        public static bool InLast(this DateTime dateTime, TimeSpan timeSpan)
+        {
+            return dateTime >= DateTime.UtcNow.Add(-timeSpan) && dateTime <= DateTime.UtcNow;
+        }
+
+        public static bool Before(this DateTime dateTime, DateTime beforeDateTime)
+        {
+            return dateTime <= beforeDateTime;
+        }
+
+        public static bool After(this DateTime dateTime, DateTime afterDateTime)
+        {
+            return dateTime >= afterDateTime;
+        }
+
+        public static bool Between(this DateTime dateTime, DateTime afterDateTime, DateTime beforeDateTime)
+        {
+            return dateTime >= afterDateTime && dateTime <= beforeDateTime;
+        }
+    }
+}