Pony.fm/app/models/Commands/DeletePlaylistCommand.php

<?php

	namespace Commands;

	use Entities\Album;
	use Entities\Playlist;
	use Entities\Track;
	use Illuminate\Support\Facades\Auth;

	class DeletePlaylistCommand extends CommandBase {
		private $_playlistId;
		private $_playlist;

		function __construct($playlistId) {
			$this->_playlistId = $playlistId;
			$this->_playlist = Playlist::find($playlistId);
		}

		/**
		 * @return bool
		 */
		public function authorize() {
			$user = Auth::user();
			return $this->_playlist && $user != null && $this->_playlist->user_id == $user->id;
		}

		/**
		 * @throws \Exception
		 * @return CommandResponse
		 */
		public function execute() {
			foreach ($this->_playlist->pins as $pin) {
				$pin->delete();
			}

			$this->_playlist->delete();
			return CommandResponse::succeed();
		}
	}