Rename center and bbox middlewares

lib/cartodb/controllers/layergroup.js

@@ -124,7 +124,7 @@ LayergroupController.prototype.register = function(app) {
         allowQueryParams(['layer']),
         this.prepareContext,
         getMapStoreMapConfigProvider(this.mapStore, this.userLimitsApi, forcedFormat),
-        center(this.previewBackend),
+        getPreviewImageByCenter(this.previewBackend),
         setCacheControlHeader(),
         setLastModifiedHeader(),
         getAffectedTables(this.layergroupAffectedTables, this.pgConnection),
@@ -140,7 +140,7 @@ LayergroupController.prototype.register = function(app) {
         allowQueryParams(['layer']),
         this.prepareContext,
         getMapStoreMapConfigProvider(this.mapStore, this.userLimitsApi, forcedFormat),
-        bbox(this.previewBackend),
+        getPreviewImageByBoundingBox(this.previewBackend),
         setCacheControlHeader(),
         setLastModifiedHeader(),
         getAffectedTables(this.layergroupAffectedTables, this.pgConnection),
@@ -422,8 +422,8 @@ function getTile (tileBackend, profileLabel = 'tile') {
     };
 }
 
-function center (previewBackend) {
-    return function centerMiddleware (req, res, next) {
+function getPreviewImageByCenter (previewBackend) {
+    return function getPreviewImageByCenterMiddleware (req, res, next) {
         const width = +req.params.width;
         const height = +req.params.height;
         const zoom = +req.params.z;
@@ -457,8 +457,8 @@ function center (previewBackend) {
     };
 }
 
-function bbox (previewBackend) {
-    return function bboxMiddleware (req, res, next) {
+function getPreviewImageByBoundingBox (previewBackend) {
+    return function getPreviewImageByBoundingBoxMiddleware (req, res, next) {
         const width = +req.params.width;
         const height = +req.params.height;
         const bounds = {