1 files changed, 77 insertions, 0 deletions
diff --git a/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
new file mode 100644
index 000000000..4852c3c6a
--- /dev/null
+++ b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
@@ -0,0 +1,77 @@
+using System;
+using System.IO;
+using System.Linq;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.Entities;
+
+namespace Emby.Server.Implementations.Library.Resolvers.Books
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public class BookResolver : MediaBrowser.Controller.Resolvers.ItemResolver<Book>
+    {
+        private readonly string[] _validExtensions = {".pdf", ".epub", ".mobi", ".cbr", ".cbz"};
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="args"></param>
+        /// <returns></returns>
+        protected override Book Resolve(ItemResolveArgs args)
+        {
+            var collectionType = args.GetCollectionType();
+
+            // Only process items that are in a collection folder containing books
+            if (!string.Equals(collectionType, CollectionType.Books, StringComparison.OrdinalIgnoreCase))
+                return null;
+            
+            if (args.IsDirectory)
+            {
+                return GetBook(args);
+            }
+
+            var extension = Path.GetExtension(args.Path);
+
+            if (extension != null && _validExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase))
+            {
+                // It's a book
+                return new Book
+                {
+                    Path = args.Path,
+                    IsInMixedFolder = true
+                };
+            }
+
+            return null;
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="args"></param>
+        /// <returns></returns>
+        private Book GetBook(ItemResolveArgs args)
+        {
+            var bookFiles = args.FileSystemChildren.Where(f =>
+            {
+                var fileExtension = Path.GetExtension(f.FullName) ??
+                                    string.Empty;
+
+                return _validExtensions.Contains(fileExtension,
+                                                StringComparer
+                                                    .OrdinalIgnoreCase);
+            }).ToList();
+
+            // Don't return a Book if there is more (or less) than one document in the directory
+            if (bookFiles.Count != 1)
+                return null;
+
+            return new Book
+                       {
+                           Path = bookFiles[0].FullName
+                       };
+        }
+    }
+}