Fixed: A potential issue when extra files for multiple authors have the same relative path

(cherry picked from commit a6a68b4cae7688506c45ff6cf10989fe6596c274)

Closes #1650

src/NzbDrone.Core/Extras/Files/ExtraFileRepository.cs

@@ -14,7 +14,7 @@ namespace NzbDrone.Core.Extras.Files
         List<TExtraFile> GetFilesByAuthor(int authorId);
         List<TExtraFile> GetFilesByBook(int authorId, int bookId);
         List<TExtraFile> GetFilesByBookFile(int bookFileId);
-        TExtraFile FindByPath(string path);
+        TExtraFile FindByPath(int authorId, string path);
     }
 
     public class ExtraFileRepository<TExtraFile> : BasicRepository<TExtraFile>, IExtraFileRepository<TExtraFile>
@@ -55,9 +55,9 @@ namespace NzbDrone.Core.Extras.Files
             return Query(c => c.BookFileId == bookFileId);
         }
 
-        public TExtraFile FindByPath(string path)
+        public TExtraFile FindByPath(int authorId, string path)
         {
-            return Query(c => c.RelativePath == path).SingleOrDefault();
+            return Query(c => c.AuthorId == authorId && c.RelativePath == path).SingleOrDefault();
         }
     }
 }

src/NzbDrone.Core/Extras/Files/ExtraFileService.cs

@@ -18,7 +18,7 @@ namespace NzbDrone.Core.Extras.Files
     {
         List<TExtraFile> GetFilesByAuthor(int authorId);
         List<TExtraFile> GetFilesByBookFile(int bookFileId);
-        TExtraFile FindByPath(string path);
+        TExtraFile FindByPath(int authorId, string path);
         void Upsert(TExtraFile extraFile);
         void Upsert(List<TExtraFile> extraFiles);
         void Delete(int id);
@@ -59,9 +59,9 @@ namespace NzbDrone.Core.Extras.Files
             return _repository.GetFilesByBookFile(bookFileId);
         }
 
-        public TExtraFile FindByPath(string path)
+        public TExtraFile FindByPath(int authorId, string path)
         {
-            return _repository.FindByPath(path);
+            return _repository.FindByPath(authorId, path);
         }
 
         public void Upsert(TExtraFile extraFile)

src/NzbDrone.Core/Extras/Others/OtherExtraFileRenamer.cs

@@ -41,8 +41,8 @@ namespace NzbDrone.Core.Extras.Others
             }
 
             var relativePath = author.Path.GetRelativePath(path);
+            var otherExtraFile = _otherExtraFileService.FindByPath(author.Id, relativePath);
 
-            var otherExtraFile = _otherExtraFileService.FindByPath(relativePath);
             if (otherExtraFile != null)
             {
                 var newPath = path + "-orig";
@@ -66,8 +66,8 @@ namespace NzbDrone.Core.Extras.Others
             }
 
             var relativePath = author.Path.GetRelativePath(path);
+            var otherExtraFile = _otherExtraFileService.FindByPath(author.Id, relativePath);
 
-            var otherExtraFile = _otherExtraFileService.FindByPath(relativePath);
             if (otherExtraFile != null)
             {
                 var subfolder = Path.GetDirectoryName(relativePath);