From 7ffe0805c1f6a0ab0732e6514214d497f7f599d3 Mon Sep 17 00:00:00 2001
From: adelikat <adelikat@tasvideos.org>
Date: Wed, 29 Oct 2014 21:41:01 +0000
Subject: [PATCH] When converting an IMovie to a TasMovie and auto-generating
 the filename, check that the file exists, and ensure a non-existent filename

---
 .../conversions/MovieConversionExtensions.cs  | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/BizHawk.Client.Common/movie/conversions/MovieConversionExtensions.cs b/BizHawk.Client.Common/movie/conversions/MovieConversionExtensions.cs
index 049d5ddd8b..47cb510789 100644
--- a/BizHawk.Client.Common/movie/conversions/MovieConversionExtensions.cs
+++ b/BizHawk.Client.Common/movie/conversions/MovieConversionExtensions.cs
@@ -1,4 +1,6 @@
 using System;
+using System.IO;
+
 using BizHawk.Common.ReflectionExtensions;
 using BizHawk.Emulation.Common;
 using BizHawk.Emulation.Cores.Nintendo.Gameboy;
@@ -9,7 +11,26 @@ namespace BizHawk.Client.Common.MovieConversionExtensions
 	{
 		public static TasMovie ToTasMovie(this IMovie old)
 		{
-			var newFilename = old.Filename + "." +  TasMovie.Extension;
+			string newFilename = old.Filename + "." + TasMovie.Extension;
+
+			if (File.Exists(newFilename))
+			{
+				int fileNum = 1;
+				bool fileConflict = true;
+				while (fileConflict)
+				{
+					if (File.Exists(newFilename))
+					{
+						newFilename = old.Filename + " (" + fileNum + ")" + "." + TasMovie.Extension;
+						fileNum++;
+					}
+					else
+					{
+						fileConflict = false;
+					}
+				}
+			}
+
 			var tas = new TasMovie(newFilename, old.StartsFromSavestate);
 
 			for (var i = 0; i < old.InputLogLength; i++)