seb86/Auto-Load-Next-Post

<?php
/**
 * Auto Load Next Post - Sidebar.
 *
 * Displays a sidebar on the settings page.
 *
 * @since    1.6.0
 * @author   Sébastien Dumont
 * @category Admin
 * @package  Auto Load Next Post/Admin
 * @license  GPL-2.0+
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

if ( ! class_exists( 'ALNP_Sidebar' ) ) {

    class ALNP_Sidebar {

        /**
         * Constructor
         *
         * @access  public
         */
        public function __construct() {
            add_action( 'auto_load_next_post_sidebar', array( $this, 'sidebar_top' ), 0 );
            add_action( 'auto_load_next_post_sidebar', array( $this, 'upgrade_details' ), 1 );
            add_action( 'auto_load_next_post_sidebar', array( $this, 'sidebar_bottom' ), 999 );
        } // END __construct()

        /**
         * Displays the top of the sidebar.
         * 
         * @access public
         */
        public function sidebar_top() {
            include_once( dirname( __FILE__ ) . '/views/html-admin-sidebar-logo.php' );

            do_action( 'auto_load_next_post_sidebar_top' );
        } // END sidebar_top()

        /**
         * Checks if Auto Load Next Post Pro is installed before 
         * displaying upgrade details in the sidebar.
         *
         * @access public
         */
        public function upgrade_details() {
            if ( ! is_alnp_pro_version_installed() ) {
                include_once( dirname( __FILE__ ) . '/views/html-admin-sidebar.php' );
            }
        } // END upgrade_details()

        /**
         * Displays plugin credits at the bottom of the sidebar.
         * 
         * @access public
         */
        public function sidebar_bottom() {
            do_action( 'auto_load_next_post_sidebar_bottom' );

            include_once( dirname( __FILE__ ) . '/views/html-admin-sidebar-credits.php' );
        } // END sidebar_bottom()

    } // END class

} // END if class exists

return new ALNP_Sidebar();