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<?php
/**
 * Role management.  This is the base class for the Roles and Edit Role screens.
 *
 * @package    Members
 * @subpackage Admin
 * @author     The MemberPress Team 
 * @copyright  Copyright (c) 2009 - 2018, The MemberPress Team
 * @link       https://members-plugin.com/
 * @license    http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 */

namespace Members\Admin;

/**
 * Role management class.
 *
 * @since  2.0.0
 * @access public
 */
final class Manage_Roles {

	/**
	 * Holds the instances of this class.
	 *
	 * @since  2.0.0
	 * @access private
	 * @var    object
	 */
	private static $instance;

	/**
	 * Name of the page we've created.
	 *
	 * @since  2.0.0
	 * @access public
	 * @var    string
	 */
	public $page = '';

	/**
	 * The page object to show.
	 *
	 * @since  2.0.0
	 * @access public
	 * @var    object
	 */
	public $page_obj = '';

	/**
	 * Sets up our initial actions.
	 *
	 * @since  2.0.0
	 * @access public
	 * @return void
	 */
	public function __construct() {

		// If the role manager is active.
		if ( members_role_manager_enabled() ) {
			add_action( 'admin_menu', array( $this, 'add_admin_page' ), 15 );
		}
	}

	/**
	 * Adds the roles page to the admin.
	 *
	 * @since  2.0.0
	 * @access public
	 * @return void
	 */
	public function add_admin_page() {

		// The "Roles" page should be shown for anyone that has the 'list_roles', 'edit_roles', or
		// 'delete_roles' caps, so we're checking against all three.
		$edit_roles_cap = apply_filters( 'members_show_roles_page_cap ', 'list_roles' );


		// If the current user can 'edit_roles'.
		if ( current_user_can( 'edit_roles' ) )
			$edit_roles_cap = 'edit_roles';

		// If the current user can 'delete_roles'.
		elseif ( current_user_can( 'delete_roles' ) )
			$edit_roles_cap = 'delete_roles';

		// Get the page title.
		$title = esc_html__( 'Roles', 'members' );

		if ( isset( $_GET['action'] ) && 'edit' === $_GET['action'] && isset( $_GET['role'] ) )
			$title = esc_html__( 'Edit Role', 'members' );

		// Create the Manage Roles page.
		$this->page = add_submenu_page( 'members', $title, esc_html__( 'Roles', 'members' ), $edit_roles_cap, 'roles', array( $this, 'page' ) );

		// Let's roll if we have a page.
		if ( $this->page ) {

			// If viewing the edit role page.
			if ( isset( $_REQUEST['action'] ) && 'edit' === $_REQUEST['action'] && current_user_can( 'edit_roles' ) )
				$this->page_obj = new Role_Edit();

			// If viewing the role list page.
			else
				$this->page_obj = new Roles();

			// Load actions.
			add_action( "load-{$this->page}", array( $this, 'load' ) );

			// Load scripts/styles.
			add_action( 'admin_enqueue_scripts', array( $this, 'enqueue' ) );
		}
	}

	/**
	 * Checks posted data on load and performs actions if needed.
	 *
	 * @since  2.0.0
	 * @access public
	 * @return void
	 */
	public function load() {

		if ( method_exists( $this->page_obj, 'load' ) )
			$this->page_obj->load();
	}

	/**
	 * Loads necessary scripts/styles.
	 *
	 * @since  2.0.0
	 * @access public
	 * @param  string  $hook_suffix
	 * @return void
	 */
	public function enqueue( $hook_suffix ) {

		if ( $this->page === $hook_suffix && method_exists( $this->page_obj, 'enqueue' ) )
			$this->page_obj->enqueue();
	}

	/**
	 * Outputs the page.
	 *
	 * @since  2.0.0
	 * @access public
	 * @return void
	 */
	public function page() {

		if ( method_exists( $this->page_obj, 'page' ) )
			$this->page_obj->page();
	}

	/**
	 * Returns the instance.
	 *
	 * @since  2.0.0
	 * @access public
	 * @return object
	 */
	public static function get_instance() {

		if ( ! self::$instance )
			self::$instance = new self;

		return self::$instance;
	}
}

Manage_Roles::get_instance();