more improvements

Author: odeimaiz

services/static-webserver/client/source/class/osparc/dashboard/TemplateBrowser.js

@@ -36,7 +36,7 @@ qx.Class.define("osparc.dashboard.TemplateBrowser", {
       }
       this._resourcesInitialized = true;
 
-      osparc.store.Templates.fetchAllTemplates()
+      osparc.store.Templates.getTemplates()
         .then(() => {
           this._resourcesList = [];
           this.getChildControl("resources-layout");
@@ -88,7 +88,7 @@ qx.Class.define("osparc.dashboard.TemplateBrowser", {
         osparc.store.Templates.getTemplates()
           .then(templates => this.__setResourcesToList(templates));
       } else {
-        osparc.store.Templates.fetchAllTemplates()
+        osparc.store.Templates.getTemplates(useCache)
           .then(templates => this.__setResourcesToList(templates))
           .catch(() => this.__setResourcesToList([]));
       }

services/static-webserver/client/source/class/osparc/store/Templates.js

@@ -19,10 +19,10 @@ qx.Class.define("osparc.store.Templates", {
   type: "static",
 
   statics: {
-    __templates: [],
+    __templates: null,
     __templatesPromisesCached: null,
 
-    fetchAllTemplates: function() {
+    __fetchAllTemplates: function() {
       return this.__templatesPromisesCached = osparc.data.Resources.getInstance().getAllPages("templates")
         .then(templates => {
           this.__templates = templates;
@@ -36,12 +36,23 @@ qx.Class.define("osparc.store.Templates", {
         });
     },
 
-    getTemplates: function() {
+    getTemplates: function(useCache = true) {
       if (this.__templatesPromisesCached) {
+        // fetching templates already in progress
         return this.__templatesPromisesCached;
       }
 
-      return new Promise(resolve => resolve(this.__templates));
+      if (this.__templates === null) {
+        // no templates cached, fetch them
+        return this.__fetchAllTemplates();
+      }
+
+      if (useCache) {
+        // templates already cached, return them
+        return new Promise(resolve => resolve(this.__templates));
+      }
+      // templates cached but force a refresh
+      return this.__fetchAllTemplates();
     },
 
     getTemplatesHypertools: function() {