Restructuring. Added services.

Aurora/Backend/Services/LibraryService.cs

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+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.IO;
+using Aurora.Backend.Models;
+using Aurora.Backend.Utils;
+using NAudio.Wave;
+
+namespace Aurora.Backend.Services
+{
+    public class LibraryService : BaseService<LibraryService>
+    {
+        #region Fields
+        private string _pathName = "/Users/brandonwatson/Music/iTunes/iTunes Media/Music";
+        private string _extensions = ".wav,.mp3,.aiff,.flac,.m4a,.m4b,.wma";
+        private Dictionary<string, Song> _library;
+
+
+        #endregion Fields
+
+        public LibraryService()
+        {
+            _library = new Dictionary<string, Song>();
+            LoadLibrary();
+        }
+
+        /// <summary>
+        /// Gets the songs.
+        /// </summary>
+        /// <returns>The songs.</returns>
+        public ObservableCollection<Song> GetLibrary()
+        {
+            ObservableCollection<Song> collection = new ObservableCollection<Song>();
+            foreach (KeyValuePair<string, Song> pair in _library)
+            {
+                collection.Add(pair.Value);
+            }
+
+            return collection;
+        }
+
+        /// <summary>
+        /// Loads library from files.
+        /// </summary>
+        private void LoadLibrary()
+        {
+            //Get songs
+            List<FileInfo> musicFiles = FileSystemUtils.TraverseFoldersAsync(_pathName, _extensions);
+
+            foreach (FileInfo file in musicFiles)
+            {
+                TagLib.File tagFile = TagLib.File.Create(file.FullName);
+
+                Song song = new Song(file)
+                {
+                    Title = tagFile.Tag.Title,
+                    Album = tagFile.Tag.Album,
+                    Artist = tagFile.Tag.FirstAlbumArtist
+                };
+
+                _library.Add(song.Id, song);
+            }
+        }
+    }
+}