<?php

class wp_auto_update_fietskoeriers {
    
    public $current_version;
    public $update_path;
    public $plugin_slug;
    public $slug;

    function __construct( $current_version, $update_path, $plugin_slug ) {
        // Set the class public variables
        $this->current_version = $current_version;
        $this->update_path     = $update_path;
        $this->plugin_slug     = $plugin_slug;
        list ($t1, $t2)        = explode( '/', $plugin_slug );
        $this->slug            = str_replace( '.php', '', $t2 );

        // define the alternative API for updating checking
        add_filter( 'pre_set_site_transient_update_plugins', array( &$this, 'check_update' ) );

        // Define the alternative response for information checking
        add_filter('plugins_api', array(&$this, 'check_info'), 10, 3);
    }

    public function check_update( $transient ) {
        // Get the remote version
        $remote_version = $this->getRemote_version();

        // If a newer version is available, add the update
        if ( version_compare( $this->current_version, $remote_version, '<' ) ) {
            $obj          = new stdClass();
            $obj->slug    = $this->slug;
            $obj->new_version = $remote_version;
            $obj->url     = $this->update_path;
            $obj->package = $this->update_path;
            $transient->response[$this->plugin_slug] = $obj;
        }
        return $transient;
    }

    public function check_info( $false, $action, $arg ) {
        if( $arg->slug === $this->slug ) {
            $information = $this->getRemote_information();
            return $information;
        }
        return false;
    }

    public function getRemote_version() {
        $request = wp_remote_post( $this->update_path, array( 'body' => array( 'action' => 'version' ) ) );
        if( ! is_wp_error( $request ) || wp_remote_retrieve_response_code( $request ) === 200 ) {
            return $request['body'];
        }
        return false;
    }

    public function getRemote_information() {
        $request = wp_remote_post( $this->update_path, array( 'body' => array( 'action' => 'info' ) ) );
        if( ! is_wp_error( $request ) || wp_remote_retrieve_response_code( $request ) === 200) {
            return unserialize( $request['body'] );
        }
        return false;
    }
}