From 57adf0e3a51fd6cb624b1cde15163777ce980161 Mon Sep 17 00:00:00 2001
From: Leonardo Galli <leonardo.galli@bluewin.ch>
Date: Sun, 4 Mar 2018 15:42:15 +0100
Subject: [PATCH] Fixed: Dates before 1970 causing an exception.

Fixes #1913
---
 src/NzbDrone.Common/Disk/DiskProviderBase.cs         | 10 ++++++++++
 src/NzbDrone.Common/Extensions/DateTimeExtensions.cs |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/src/NzbDrone.Common/Disk/DiskProviderBase.cs b/src/NzbDrone.Common/Disk/DiskProviderBase.cs
index 5ba2021cc..8b888e1ce 100644
--- a/src/NzbDrone.Common/Disk/DiskProviderBase.cs
+++ b/src/NzbDrone.Common/Disk/DiskProviderBase.cs
@@ -294,12 +294,22 @@ namespace NzbDrone.Common.Disk
         {
             Ensure.That(path, () => path).IsValidPath();
 
+            if (dateTime.Before(DateTimeExtensions.Epoch))
+            {
+                dateTime = DateTimeExtensions.Epoch;
+            }
+
             Directory.SetLastWriteTimeUtc(path, dateTime);
         }
 
         public void FileSetLastWriteTime(string path, DateTime dateTime)
         {
             Ensure.That(path, () => path).IsValidPath();
+            
+            if (dateTime.Before(DateTimeExtensions.Epoch))
+            {
+                dateTime = DateTimeExtensions.Epoch;
+            }
 
             File.SetLastWriteTime(path, dateTime);
         }
diff --git a/src/NzbDrone.Common/Extensions/DateTimeExtensions.cs b/src/NzbDrone.Common/Extensions/DateTimeExtensions.cs
index 75be57cb6..ef965e1ec 100644
--- a/src/NzbDrone.Common/Extensions/DateTimeExtensions.cs
+++ b/src/NzbDrone.Common/Extensions/DateTimeExtensions.cs
@@ -38,5 +38,7 @@ namespace NzbDrone.Common.Extensions
         {
             return dateTime >= afterDateTime && dateTime <= beforeDateTime;
         }
+        
+        public static DateTime Epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
     }
 }