From 6b3dc8ece0772dc0224833d695f7d6b93ebd182f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Garc=C3=ADa=20Aubert?=
 <danielgarciaaubert@gmail.com>
Date: Wed, 14 Mar 2018 13:05:05 +0100
Subject: [PATCH] Extract prepareLayerFilterFromPreviewLayers middleware from
 controller's context

---
 lib/cartodb/controllers/named_maps.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/cartodb/controllers/named_maps.js b/lib/cartodb/controllers/named_maps.js
index 09b27dbc..c78a8174 100644
--- a/lib/cartodb/controllers/named_maps.js
+++ b/lib/cartodb/controllers/named_maps.js
@@ -78,7 +78,7 @@ NamedMapsController.prototype.register = function(app) {
         getNamedMapProvider(staticOptions),
         getAffectedTables(),
         getTemplate(staticOptions),
-        this.prepareLayerFilterFromPreviewLayers(staticOptions),
+        prepareLayerFilterFromPreviewLayers(staticOptions),
         this.getStaticImageOptions(),
         this.getImage(staticOptions),
         this.incrementMapViews(),
@@ -152,7 +152,7 @@ function getTemplate ({ label }) {
     };
 };
 
-NamedMapsController.prototype.prepareLayerFilterFromPreviewLayers = function ({ label }) {
+function prepareLayerFilterFromPreviewLayers ({ namedMapProviderCache, label }) {
     return function prepareLayerFilterFromPreviewLayersMiddleware (req, res, next) {
         const { user, template } = res.locals;
         const { template_id } = req.params;
@@ -181,7 +181,7 @@ NamedMapsController.prototype.prepareLayerFilterFromPreviewLayers = function ({
         params.layer = layerVisibilityFilter.join(',');
 
         // recreates the provider
-        this.namedMapProviderCache.get(user, template_id, config, auth_token, params, (err, provider) => {
+        namedMapProviderCache.get(user, template_id, config, auth_token, params, (err, provider) => {
             if (err) {
                 err.label = label;
                 return next(err);
@@ -191,7 +191,7 @@ NamedMapsController.prototype.prepareLayerFilterFromPreviewLayers = function ({
 
             next();
         });
-    }.bind(this);
+    };
 };
 
 NamedMapsController.prototype.getTile = function ({ label }) {