listplaylists command created + test.

LibMpc/Commands/Commands.Playlists.cs

@@ -1,4 +1,8 @@
-namespace LibMpc
+using System.Collections.Generic;
+using System.Linq;
+using LibMpc.Types;
+
+namespace LibMpc
 {
     public partial class Commands
     {
@@ -17,7 +21,32 @@
             /// </summary>
             public static class Stored
             {
-                
+                /// <summary>
+                /// Prints a list of the playlist directory.
+                /// </summary>
+                public class ListPlaylists : IMpcCommand<IEnumerable<MpdPlaylist>>
+                {
+                    public string Value => "listplaylists";
+
+                    public IEnumerable<MpdPlaylist> FormatResponse(IList<KeyValuePair<string, string>> response)
+                    {
+                        var result = new List<MpdPlaylist>();
+
+                        foreach (var line in response)
+                        {
+                            if (line.Key.Equals("playlist"))
+                            {
+                                result.Add(new MpdPlaylist(line.Value));
+                            }
+                            else if (line.Key.Equals("Last-Modified"))
+                            {
+                                result.Last().AddLastModified(line.Value);
+                            }
+                        }
+
+                        return result;
+                    }
+                }
             }
         }
     }