members-role-levels.php

<?php
/**
 * Plugin Name: Members - Role Levels
 * Plugin URI:  http://themehybrid.com/plugins/members
 * Description: Exposes the old user levels system, which fixes the WordPress author drop-down bug when users don't have a role with one of the assigned levels.
 * Version:     1.0.0
 * Author:      Justin Tadlock
 * Author URI:  http://justintadlock.com
 * Text Domain: members-role-levels
 * Domain Path: /languages
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not,
 * write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @package    MembersRoleLevels
 * @version    1.0.0
 * @author     Justin Tadlock <justin@justintadlock.com>
 * @copyright  Copyright (c) 2015, Justin Tadlock
 * @link       http://themehybrid.com/plugins/members-role-levels
 * @license    http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 */

/**
 * Singleton class for setting up the plugin.
 *
 * @since  1.0.0
 * @access public
 */
final class Members_Role_Levels_Plugin {

	/**
	 * Plugin directory path.
	 *
	 * @since  1.0.0
	 * @access public
	 * @var    string
	 */
	public $dir_path = '';

	/**
	 * Constructor method.
	 *
	 * @since  1.0.0
	 * @access private
	 * @return void
	 */
	private function __construct() {}

	/**
	 * Sets up globals.
	 *
	 * @since  1.0.0
	 * @access public
	 * @return void
	 */
	private function setup() {

		$this->dir_path = trailingslashit( plugin_dir_path( __FILE__ ) );
	}

	/**
	 * Loads files needed by the plugin.
	 *
	 * @since  1.0.0
	 * @access public
	 * @return void
	 */
	private function includes() {

		if ( is_admin() ) {

			require_once( $this->dir_path . 'admin/functions-helpers.php'    );
			require_once( $this->dir_path . 'admin/class-column-level.php'   );
			require_once( $this->dir_path . 'admin/class-meta-box-level.php' );
		}
	}

	/**
	 * Sets up main plugin actions and filters.
	 *
	 * @since  1.0.0
	 * @access public
	 * @return void
	 */
	private function setup_actions() {

		// Internationalize the text strings used.
		add_action( 'plugins_loaded', array( $this, 'i18n' ), 2 );

		// Always hide the old user levels in Members.
		add_filter( 'members_remove_old_levels', '__return_true', 95 );
	}

	/**
	 * Loads the translation files.
	 *
	 * @since  1.0.0
	 * @access public
	 * @return void
	 */
	public function i18n() {
		load_plugin_textdomain( 'members-role-levels', false, trailingslashit( dirname( plugin_basename( __FILE__ ) ) ). 'languages' );
	}

	/**
	 * Returns the instance.
	 *
	 * @since  1.0.0
	 * @access public
	 * @return object
	 */
	public static function get_instance() {

		static $instance = null;

		if ( is_null( $instance ) ) {
			$instance = new Members_Role_Levels_Plugin;
			$instance->setup();
			$instance->includes();
			$instance->setup_actions();
		}

		return $instance;
	}
}

Members_Role_Levels_Plugin::get_instance();