New: Write metadata to tags, with UI for previewing changes (#633)

src/NzbDrone.Core/MediaFiles/Commands/RetagArtistCommand.cs

@@ -0,0 +1,18 @@
+using System.Collections.Generic;
+using NzbDrone.Core.Messaging.Commands;
+
+namespace NzbDrone.Core.MediaFiles.Commands
+{
+    public class RetagArtistCommand : Command
+    {
+        public List<int> ArtistIds { get; set; }
+
+        public override bool SendUpdatesToClient => true;
+        public override bool RequiresDiskAccess => true;
+
+        public RetagArtistCommand()
+        {
+            ArtistIds = new List<int>();
+        }
+    }
+}

src/NzbDrone.Core/MediaFiles/Commands/RetagFilesCommand.cs

@@ -0,0 +1,24 @@
+using System.Collections.Generic;
+using NzbDrone.Core.Messaging.Commands;
+
+namespace NzbDrone.Core.MediaFiles.Commands
+{
+    public class RetagFilesCommand : Command
+    {
+        public int ArtistId { get; set; }
+        public List<int> Files { get; set; }
+
+        public override bool SendUpdatesToClient => true;
+        public override bool RequiresDiskAccess => true;
+
+        public RetagFilesCommand()
+        {
+        }
+
+        public RetagFilesCommand(int artistId, List<int> files)
+        {
+            ArtistId = artistId;
+            Files = files;
+        }
+    }
+}