OwlCyberSecurity - MANAGER

Edit File: class.jetpack-json-api-themes-delete-endpoint.php

<?php

class Jetpack_JSON_API_Themes_Delete_Endpoint extends Jetpack_JSON_API_Themes_Endpoint {

// POST  /sites/%s/plugins/%s/delete
	protected $needed_capabilities = 'delete_themes';
	protected $action              = 'delete';

protected function delete() {

foreach( $this->themes as $theme ) {

// Don't delete an active child theme
			if ( is_child_theme() && $theme == get_stylesheet() )  {
				$error = $this->log[ $theme ]['error'] = 'You cannot delete a theme while it is active on the main site.';
				continue;
			}

if( $theme == get_template() ) {
				$error = $this->log[ $theme ]['error'] = 'You cannot delete a theme while it is active on the main site.';
				continue;
			}

/**
			 * Filters whether to use an alternative process for deleting a WordPress.com theme.
			 * The alternative process can be executed during the filter.
			 *
			 * The filter can also return an instance of WP_Error; in which case the endpoint response will
			 * contain this error.
			 *
			 * @module json-api
			 *
			 * @since 4.4.2
			 *
			 * @param bool   $use_alternative_delete_method Whether to use the alternative method of deleting
			 *                                              a WPCom theme.
			 * @param string $theme_slug                    Theme name (slug). If it is a WPCom theme,
			 *                                              it should be suffixed with `-wpcom`.
			 */
			$result = apply_filters( 'jetpack_wpcom_theme_delete', false, $theme );

if ( ! $result ) {
				$result = delete_theme( $theme );
			}

if ( is_wp_error( $result ) ) {
				$error = $this->log[ $theme ]['error'] = $result->get_error_messages();
			} else {
				$this->log[ $theme ][] = 'Theme deleted';
			}
		}

if( ! $this->bulk && isset( $error ) ) {
			return  new WP_Error( 'delete_theme_error', $error, 400 );
		}

return true;
	}

}