Scalr_UI_Controller_Scripts::xRemoveVersionAction PHP Method

    public function xRemoveVersionAction($scriptId, $version)
    {
        $this->request->restrictAccess('SCRIPTS', 'MANAGE');
        /* @var $script Script */
        $script = Script::findPk($scriptId);
        if (!$script) {
            throw new Scalr_UI_Exception_NotFound();
        }
        $script->checkPermission($this->user, $this->getEnvironmentId(true));
        if (!$script->accountId && $this->user->getType() != Scalr_Account_User::TYPE_SCALR_ADMIN) {
            throw new Scalr_Exception_InsufficientPermissions();
        }
        if ($script->getVersions()->count() == 1) {
            throw new Exception('You can\'t delete the last version.');
        }
        $version = $script->getVersion($version);
        if (!$version) {
            throw new Scalr_UI_Exception_NotFound();
        }
        $version->delete();
        $script->getVersions(true);
        // reset cache
        $this->response->success();
        $this->response->data(['script' => $this->getScriptInfo($script)]);
    }