~unity-team/unity-lens-music/6.0

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/*
 * Copyright (C) 2012 Canonical Ltd
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authored by Pawel Stolowski <pawel.stolowski@canonical.com>
 */

namespace Unity.MusicLens {
  
  static const string PREVIEW_PLAYER_DBUS_NAME = "com.canonical.Unity.Lens.Music.PreviewPlayer";
  static const string PREVIEW_PLAYER_DBUS_PATH = "/com/canonical/Unity/Lens/Music/PreviewPlayer";

  [DBus (name = "com.canonical.Unity.Lens.Music.PreviewPlayer")]
  public interface PreviewPlayerService: GLib.Object
  {
    public signal void progress(string uri, uint32 state, double progress);

    public abstract async void play (string uri) throws Error;
    public abstract async void pause () throws Error;
    public abstract async void pause_resume () throws Error;
    public abstract async void resume () throws Error;
    public abstract async void stop () throws Error;
    public abstract async void close () throws Error;
  }
  
  public class PreviewPlayer: GLib.Object
  {
    public signal void progress(string uri, Unity.MusicPreview.TrackState state, double progress);

    public async void connect_to () throws Error
    {
      _preview_player_service = Bus.get_proxy_sync (BusType.SESSION, PREVIEW_PLAYER_DBUS_NAME, PREVIEW_PLAYER_DBUS_PATH);
      _preview_player_service.progress.connect (on_progress_signal);
    }

    public async void play (string uri) throws Error
    {
      if (_preview_player_service == null)
      {
        yield connect_to ();
      }
      yield _preview_player_service.play (uri);
    }

    public async void pause () throws Error
    {
      if (_preview_player_service == null)
      {
        yield connect_to ();
      }
      yield _preview_player_service.pause ();
    }

    public async void pause_resume () throws Error
    {
      if (_preview_player_service == null)
      {
        yield connect_to ();
      }
      yield _preview_player_service.pause_resume ();
    }

    public async void resume () throws Error
    {
      if (_preview_player_service == null)
      {
        yield connect_to ();
      }
      yield _preview_player_service.resume ();
    }

    public async void stop () throws Error
    {
      if (_preview_player_service == null)
      {
        yield connect_to ();
      }
      yield _preview_player_service.stop ();
    }

    public async void close () throws Error
    {
      if (_preview_player_service == null)
      {
        yield connect_to ();
      }
      yield _preview_player_service.close ();
    }

    internal void on_progress_signal (string uri, uint32 state, double progress_value)
    {
      progress(uri, (Unity.MusicPreview.TrackState)state, progress_value);
    }

    private PreviewPlayerService _preview_player_service;
  }
}