fix library scan stopping and restarting itself

1 files changed, 24 insertions, 5 deletions

diff --git a/MediaBrowser.Server.Implementations/Providers/ImageSaver.cs b/MediaBrowser.Server.Implementations/Providers/ImageSaver.cs
index 7b5c0df34d..0653bcebd7 100644
--- a/MediaBrowser.Server.Implementations/Providers/ImageSaver.cs
+++ b/MediaBrowser.Server.Implementations/Providers/ImageSaver.cs
@@ -1,4 +1,5 @@
-using MediaBrowser.Common.IO;
+using System.Collections.Generic;
+using MediaBrowser.Common.IO;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
@@ -268,7 +269,7 @@ namespace MediaBrowser.Server.Implementations.Providers
                     {
                         item.ScreenshotImagePaths[imageIndex.Value] = path;
                     }
-                    else
+                    else if (!item.ScreenshotImagePaths.Contains(path, StringComparer.OrdinalIgnoreCase))
                     {
                         item.ScreenshotImagePaths.Add(path);
                     }
@@ -282,7 +283,7 @@ namespace MediaBrowser.Server.Implementations.Providers
                     {
                         item.BackdropImagePaths[imageIndex.Value] = path;
                     }
-                    else
+                    else if (!item.BackdropImagePaths.Contains(path, StringComparer.OrdinalIgnoreCase))
                     {
                         item.BackdropImagePaths.Add(path);
                     }
@@ -333,14 +334,14 @@ namespace MediaBrowser.Server.Implementations.Providers
                     {
                         throw new ArgumentNullException("imageIndex");
                     }
-                    filename = imageIndex.Value == 0 ? "backdrop" : "backdrop" + imageIndex.Value.ToString(UsCulture);
+                    filename = GetBackdropSaveFilename(item.BackdropImagePaths, "backdrop", "backdrop", imageIndex.Value);
                     break;
                 case ImageType.Screenshot:
                     if (!imageIndex.HasValue)
                     {
                         throw new ArgumentNullException("imageIndex");
                     }
-                    filename = imageIndex.Value == 0 ? "screenshot" : "screenshot" + imageIndex.Value.ToString(UsCulture);
+                    filename = GetBackdropSaveFilename(item.ScreenshotImagePaths, "screenshot", "screenshot", imageIndex.Value);
                     break;
                 default:
                     filename = type.ToString().ToLower();
@@ -380,6 +381,24 @@ namespace MediaBrowser.Server.Implementations.Providers
             return path;
         }
 
+        private string GetBackdropSaveFilename(List<string> images, string zeroIndexFilename, string numberedIndexPrefix, int index)
+        {
+            var filesnames = images.Select(Path.GetFileNameWithoutExtension).ToList();
+
+            if (index == 0)
+            {
+                return zeroIndexFilename;
+            }
+
+            var current = index;
+            while (filesnames.Contains(numberedIndexPrefix + current.ToString(UsCulture), StringComparer.OrdinalIgnoreCase))
+            {
+                current++;
+            }
+
+            return numberedIndexPrefix + current.ToString(UsCulture);
+        }
+
         /// <summary>
         /// Gets the compatible save paths.
         /// </summary>