File classes/class.extension-loader.php | Inbound Pro Plugin

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<?php

/**
 * Class for autoloading detected extensions inside /wp-content/uploads/inbound-pro/extensions
 * @package     InboundPro
 * @subpackage  AutoLoading
*/

class Inbound_Extension_Loads {

    /**
    *  Initiate class
    */
    public function __construct() {
        self::load_hooks();
        self::load_extensions();
    }

    /**
    *  Load hooks and filters
    */
    public static function load_hooks() {

        /* add hook to plugins_url for extension constant correction */
        add_filter( 'plugins_url' , array( __CLASS__ , 'alter_constants' ) , 1 , 3 );
    }


    /**
    *  Load extensions set as installed in the configuration dataset
    */
    public static function load_extensions() {

        if ( INBOUND_ACCESS_LEVEL == 0 || INBOUND_ACCESS_LEVEL == 9 ) {
            return;
        }

        $configuration = Inbound_Options_API::get_option( 'inbound-pro' , 'configuration' , array() );
        foreach( $configuration as $key => $extension){

            if ( $extension['status'] != 'installed' || $extension['download_type'] != 'extension' || !isset($extension['filename']) ) {
                continue;
            }

            if ( file_exists( $extension['upload_path'] . '/' . $extension['filename'] . '.php' ) ) {
                include_once( $extension['upload_path'] . '/' . $extension['filename'] . '.php' );
            }
            /* account for servers who's absolute path changes */
            else {
                $parts = explode('extensions/' , $extension['upload_path']);
                $slug = end($parts);
                if ( file_exists( INBOUND_PRO_UPLOADS_PATH . 'extensions/'.  $slug . '/' . $extension['filename'] . '.php' ) ) {
                    include_once( INBOUND_PRO_UPLOADS_PATH . 'extensions/'.$slug . '/' . $extension['filename'] . '.php' );
                }
            }
        }
    }


    /**
    *  check to see if plugins_url() is being called from an uploads folder
    */
    public static function alter_constants( $url, $path, $plugin ) {
        /* TODO remove extra layer of folders */
        if ( !strstr($plugin , 'uploads/inbound-pro/extensions/' ) ) {
            return $url;
        }

        $parts = explode( 'uploads/inbound-pro/' , $plugin );
        $extension = explode( '/' , $parts[1]) ;

        return INBOUND_PRO_UPLOADS_URLPATH . 'extensions/' . $extension[1] . '/';
    }

}

new Inbound_Extension_Loads();

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