Cleaning up the solution. Separating Shared.WinRT, Services and Synchronization. Removing synchronization from app. Reducing bundle size by 45mb.

Wino.Core.Domain/Interfaces/IOutlookChangeProcessor.cs

@@ -0,0 +1,22 @@
+namespace Wino.Domain.Interfaces
+{
+    public interface IOutlookChangeProcessor : IDefaultChangeProcessor
+    {
+        /// <summary>
+        /// Interrupted initial synchronization may cause downloaded mails to be saved in the database twice.
+        /// Since downloading mime is costly in Outlook, we need to check if the actual copy of the message has been saved before.
+        /// </summary>
+        /// <param name="messageId">MailCopyId of the message.</param>
+        /// <returns>Whether the mime has b</returns>
+        Task<bool> IsMailExistsAsync(string messageId);
+
+        /// <summary>
+        /// Updates Folder's delta synchronization identifier.
+        /// Only used in Outlook since it does per-folder sync.
+        /// </summary>
+        /// <param name="folderId">Folder id</param>
+        /// <param name="synchronizationIdentifier">New synchronization identifier.</param>
+        /// <returns>New identifier if success.</returns>
+        Task UpdateFolderDeltaSynchronizationIdentifierAsync(Guid folderId, string deltaSynchronizationIdentifier);
+    }
+}