eventespresso / event-espresso-core

     */

    public function registerManifestFile($namespace, $url_base, $manifest_file, $manifest_file_path = '')

    {

        if (isset($this->manifest_data[ $namespace ])) {

            if (! $this->debug()) {

                return;

            }

            throw new InvalidArgumentException(

                sprintf(

                    esc_html__(

                        'The namespace for this manifest file has already been registered, choose a namespace other than %s',

                        'event_espresso'

                    ),

                    $namespace

                )

            );

        }

        if (filter_var($url_base, FILTER_VALIDATE_URL) === false) {

            if (is_admin()) {

                EE_Error::add_error(

            $this->jsdata['templates'] = array();

        }

        //no overrides allowed.

        if (isset($this->jsdata['templates'][ $template_reference ])) {

            if (! $this->debug()) {

                return;

            }

            throw new InvalidArgumentException(

                sprintf(

                    __(

                        'The %1$s key already exists for the templates array in the js data array.  No overrides are allowed.',

                        'event_espresso'

                    ),

                    $template_reference

                )

            );

        }

        $this->jsdata['templates'][ $template_reference ] = $template_content;

    }