Allow module to provide resources and automatically expose them

packages/node_modules/@node-red/registry/lib/registry.js

@@ -15,8 +15,8 @@
  **/
 
  //var UglifyJS = require("uglify-js");
-var path = require("path");
-var fs = require("fs");
+const path = require("path");
+const fs = require("fs");
 
 var library = require("./library");
 const {events} = require("@node-red/util")
@@ -680,7 +680,6 @@ function getNodeIconPath(module,icon) {
 
 function getNodeIcons() {
     var iconList = {};
-
     for (var module in moduleConfigs) {
         if (moduleConfigs.hasOwnProperty(module)) {
             if (moduleConfigs[module].icons) {
@@ -692,6 +691,21 @@ function getNodeIcons() {
     return iconList;
 }
 
+function getModuleResource(module, resourcePath) {
+    let mod = moduleConfigs[module];
+    if (mod && mod.resources) {
+        let basePath = mod.resources.path;
+        let fullPath = path.join(basePath,resourcePath);
+        if (/^\.\./.test(path.relative(basePath,fullPath))) {
+            return null;
+        }
+        if (fs.existsSync(fullPath)) {
+            return fullPath;
+        }
+    }
+    return null;
+}
+
 var registry = module.exports = {
     init: init,
     load: load,
@@ -722,6 +736,8 @@ var registry = module.exports = {
 
     getNodeIconPath: getNodeIconPath,
     getNodeIcons: getNodeIcons,
+    getModuleResource: getModuleResource,
+
     /**
      * Gets all of the node template configs
      * @return all of the node templates in a single string