From f215ba9bac4d65619bad3d31a848bcf255d39f3f Mon Sep 17 00:00:00 2001
From: Taloth Saldono <Taloth@users.noreply.github.com>
Date: Thu, 7 Feb 2019 12:52:18 +0100
Subject: [PATCH] Fixed: Additional reverse title parser patterns.

fixes #2943
---
 .../ParserTests/HashedReleaseFixture.cs            | 14 ++++++++++++++
 src/NzbDrone.Core/Parser/Parser.cs                 |  2 +-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/NzbDrone.Core.Test/ParserTests/HashedReleaseFixture.cs b/src/NzbDrone.Core.Test/ParserTests/HashedReleaseFixture.cs
index 6eec4058f..663581d75 100644
--- a/src/NzbDrone.Core.Test/ParserTests/HashedReleaseFixture.cs
+++ b/src/NzbDrone.Core.Test/ParserTests/HashedReleaseFixture.cs
@@ -94,6 +94,20 @@ public class HashedReleaseFixture : CoreTest
                 "Sons of Anarchy",
                 Quality.HDTV720p,
                 null
+            },
+            new object[]
+            {
+                @"50E50S.denorD.mkv".AsOsAgnostic(),
+                "Droned",
+                Quality.HDTV720p,
+                null
+            },
+            new object[]
+            {
+                @"C:\Test\XxQVHK4GJMP3n2dLpmhW\XxQVHK4GJMP3n2dLpmhW\50E50S.denorD.mkv".AsOsAgnostic(),
+                "Droned",
+                Quality.HDTV720p,
+                null
             }
         };
 
diff --git a/src/NzbDrone.Core/Parser/Parser.cs b/src/NzbDrone.Core/Parser/Parser.cs
index 58df4cc78..9f1dbb88a 100644
--- a/src/NzbDrone.Core/Parser/Parser.cs
+++ b/src/NzbDrone.Core/Parser/Parser.cs
@@ -299,7 +299,7 @@ public static class Parser
             };
 
         //Regex to detect whether the title was reversed.
-        private static readonly Regex ReversedTitleRegex = new Regex(@"[-._ ](p027|p0801|\d{2,3}E\d{2}S)[-._ ]", RegexOptions.Compiled);
+        private static readonly Regex ReversedTitleRegex = new Regex(@"(?:^|[-._ ])(p027|p0801|\d{2,3}E\d{2}S)[-._ ]", RegexOptions.Compiled);
 
         private static readonly Regex NormalizeRegex = new Regex(@"((?:\b|_)(?<!^)(a(?!$)|an|the|and|or|of)(?:\b|_))|\W|_",
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);