Add block unrated option

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -1072,6 +1072,11 @@ namespace MediaBrowser.Controller.Entities
                 return true;
             }
 
+            if (user.Configuration.BlockNotRated && string.IsNullOrEmpty(CustomRating ?? OfficialRating))
+            {
+                return false;
+            }
+
             return Ratings.Level(CustomRating ?? OfficialRating) <= user.Configuration.MaxParentalRating.Value;
         }
 

MediaBrowser.Controller/Entities/Folder.cs

@@ -120,6 +120,21 @@ namespace MediaBrowser.Controller.Entities
             await LibraryManager.SaveChildren(Id, newChildren, cancellationToken).ConfigureAwait(false);
         }
 
+        /// <summary>
+        /// Never want folders to be blocked by "BlockNotRated"
+        /// </summary>
+        public override string OfficialRating
+        {
+            get
+            {
+                return !string.IsNullOrEmpty(base.OfficialRating) ? base.OfficialRating : "None";
+            }
+            set
+            {
+                base.OfficialRating = value;
+            }
+        }
+
         /// <summary>
         /// Removes the child.
         /// </summary>