Purge All cache if menu is associated with any location else ignore

admin/class-purger.php

@@ -1161,6 +1161,10 @@ public function purge_on_term_taxonomy_edited( $term_id, $tt_id, $taxon ) {
 
 		global $nginx_helper_admin;
 
+		if ( $taxon === 'nav_menu' ) {
+			return;
+		}
+
 		if ( ! $nginx_helper_admin->options['enable_purge'] ) {
 			return;
 		}
@@ -1217,6 +1221,32 @@ public function purge_on_check_ajax_referer( $action ) {
 
 	}
 
+	/**
+	 * Purge All on Nav Menu Update.
+	 * Only if the menu is associated with any display location.
+	 *
+	 * @param int $menu_id Menu ID
+	 *
+	 * @return void
+	 */
+	public function purge_on_nav_menu_update( $menu_id ) {
+
+		global $nginx_helper_admin;
+
+		if ( ! $nginx_helper_admin->options['enable_purge'] ) {
+			return;
+		}
+
+		$this->log( sprintf( __( 'Menu updated. Menu ID: %s', 'nginx-helper' ), $menu_id ) );
+
+		$menu_locations = get_nav_menu_locations();
+
+		if ( in_array( $menu_id, $menu_locations, true ) ) {
+
+			$this->purge_all();
+		}
+	}
+
 	/**
 	 * Unlink file recursively.
 	 * Source - http://stackoverflow.com/a/1360437/156336

includes/class-nginx-helper.php

@@ -223,6 +223,7 @@ private function define_admin_hooks() {
 		$this->loader->add_action( 'edit_term', $nginx_purger, 'purge_on_term_taxonomy_edited', 20, 3 );
 		$this->loader->add_action( 'delete_term', $nginx_purger, 'purge_on_term_taxonomy_edited', 20, 3 );
 		$this->loader->add_action( 'check_ajax_referer', $nginx_purger, 'purge_on_check_ajax_referer', 20 );
+		$this->loader->add_action( 'wp_update_nav_menu', $nginx_purger, 'purge_on_nav_menu_update', 20 );
 		$this->loader->add_action( 'admin_bar_init', $nginx_helper_admin, 'purge_all' );
 
 		// expose action to allow other plugins to purge the cache.