Error Copying Directory On Plugin Activation

Question

I am trying to copy directory using WP_Filesystem API with the method copy_dir() on plugin activation, but it is give me the following error message:

Plugin could not be activated because it triggered a fatal error.

Fatal error: Call to undefined method WP_Filesystem_Direct::copy_dir()
in D:\xampp\htdocs\wordpress\wp-content\plugins\xxxxxxxx\xxxxxx.php on line 98

Here is my codes:

function sstssfb_activation_hook_vcheck() {
    delete_option(esc_attr("sstssfb_stop_showingvchecknotice"));

    /* INITIALIZE WPFilesytem */
    $access_type = get_filesystem_method();
    if($access_type === 'direct') {
        $url = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
        $creds = request_filesystem_credentials($url, '', false, false, array());
            // initialize the API
            if ( ! WP_Filesystem($creds) ) {
                // any problems and we exit
                return;
            }
            global $wp_filesystem;
    /* CREATE SSTSSFB_ASSETS DIRECTORY */
        if(!$wp_filesystem->is_dir(SSTSSFB_ASSET_DIR)) 
        {
            $wp_filesystem->mkdir(SSTSSFB_ASSET_DIR);
        }

    /* MOVE ADDITIONAL assets TO THAT (sstssfb_assets) DIRECTORY */
        // addons
        if(file_exists(SSTSSFBDIR_ADDONS_ORI))
        $wp_filesystem->copy_dir(SSTSSFBDIR_ADDONS_ORI, SSTSSFB_ASSET_DIR, true);
        $wp_filesystem->delete(SSTSSFBDIR_ADDONS_ORI);
        // themes
        if(file_exists(SSTSSFB_THEMEDIR_ORI))
        $wp_filesystem->copy_dir(SSTSSFB_THEMEDIR_ORI, SSTSSFB_ASSET_DIR, true);
        $wp_filesystem->delete(SSTSSFBDIR_ADDONS_ORI);
    }

    }
    register_activation_hook(__FILE__, "sstssfb_activation_hook_vcheck");

What would be the problem here?

Answer 1

That was my fault!

The problem is copy_dir isn't a WP_Filesystem method, so it cannot be called as an instance of WP_Filesystem like this: $wp_filesystem->copy_dir(), but independently like this: copy_dir("source", "destination") after the WP_Filesystem() has already been called and setup.

Reference copy_dir