Code cleanup. Implemented ability to schedule Library Backups.

API/Interfaces/Services/IDirectoryService.cs

@@ -0,0 +1,31 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using API.DTOs;
+
+namespace API.Interfaces.Services
+{
+    public interface IDirectoryService
+    {
+        /// <summary>
+        /// Lists out top-level folders for a given directory. Filters out System and Hidden folders.
+        /// </summary>
+        /// <param name="rootPath">Absolute path of directory to scan.</param>
+        /// <returns>List of folder names</returns>
+        IEnumerable<string> ListDirectory(string rootPath);
+
+        Task<ImageDto> ReadImageAsync(string imagePath);
+        /// <summary>
+        /// Gets files in a directory. If searchPatternExpression is passed, will match the regex against for filtering.
+        /// </summary>
+        /// <param name="path"></param>
+        /// <param name="searchPatternExpression"></param>
+        /// <returns></returns>
+        string[] GetFiles(string path, string searchPatternExpression = "");
+        /// <summary>
+        /// Returns true if the path exists and is a directory. If path does not exist, this will create it. Returns false in all fail cases.
+        /// </summary>
+        /// <param name="directoryPath"></param>
+        /// <returns></returns>
+        bool ExistOrCreate(string directoryPath);
+    }
+}