main

<?php

namespace WPO\WC\PDF_Invoices\Legacy;

​

defined( 'ABSPATH' ) or exit;

​

if ( !class_exists( '\\WPO\\WC\\PDF_Invoices\\Legacy\\WPO_WCPDF_Legacy' ) ) :

​

class WPO_WCPDF_Legacy {

    public static $version;

    public $enabled;

    public $settings;

    public $export;

    public $functions;

​

    protected static $_instance = null;

​

    /**

     * Main Plugin Instance

     *

     * Ensures only one instance of plugin is loaded or can be loaded.

     */

    public static function instance() {

        if ( is_null( self::$_instance ) ) {

            self::$_instance = new self();

        }

        return self::$_instance;

    }

​

    /**

     * Constructor

     */

    public function __construct() {

        self::$version   = WPO_WCPDF()->version;

        $this->enabled   = WPO_WCPDF()->legacy_mode_enabled();

        $this->settings  = include_once( 'class-wcpdf-legacy-settings.php' );

        $this->export    = include_once( 'class-wcpdf-legacy-export.php' );

        $this->functions = include_once( 'class-wcpdf-legacy-functions.php' );

    }

​

    /**

     * Redirect function calls directly to legacy functions class

     */

    public function __call( $name, $arguments ) {

        $human_readable_call = '$wpo_wcpdf->'.$name.'()';

        $this->auto_enable_check( $human_readable_call );

​

        if ( is_callable( array( WPO_WCPDF(), $name ) ) ) {

            wcpdf_deprecated_function( $human_readable_call, '2.0', 'WPO_WCPDF()->'.$name.'()' );

            return call_user_func_array( array( WPO_WCPDF(), $name ), $arguments );

        } elseif ( is_callable( array( $this->functions, $name ) ) ) {

            wcpdf_deprecated_function( $human_readable_call, '2.0', '$this->'.$name.'()' );

            return call_user_func_array( array( $this->functions, $name ), $arguments );

        } else {

            throw new \Exception("Call to undefined method ".__CLASS__."::{$name}()", 1);

        }

    }

​

    /**

     * Fired when a call is made to the legacy class (also used by sub classes).

     * If legacy mode was not enabled, it is automatically enabled and an error message is shown to the user

     * Reloading the page should then work in legacy mode

     */

    public function auto_enable_check( $call = '', $die = true ) {