Lots of bug fixes around publishing and handling weird cases on a real manga library. Implemented ability to have Volumes number 0 aka just latest chapters. Refactored DirectoryService code for scanning into it's own service. Lots of debug code, will be cleaned up later.

API/Interfaces/IScannerService.cs

@@ -0,0 +1,25 @@
+using System.Threading.Tasks;
+using API.DTOs;
+
+namespace API.Interfaces
+{
+    public interface IScannerService
+    {
+        /// <summary>
+        /// Given a library id, scans folders for said library. Parses files and generates DB updates. Will overwrite
+        /// cover images if forceUpdate is true.
+        /// </summary>
+        /// <param name="libraryId">Library to scan against</param>
+        /// <param name="forceUpdate">Force overwriting for cover images</param>
+        void ScanLibrary(int libraryId, bool forceUpdate);
+
+        void ScanLibraries();
+
+        /// <summary>
+        /// Performs a forced scan of just a series folder.
+        /// </summary>
+        /// <param name="libraryId"></param>
+        /// <param name="seriesId"></param>
+        void ScanSeries(int libraryId, int seriesId);
+    }
+}