Support npm subflow modules

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

@@ -20,6 +20,7 @@ var fs = require("fs");
 
 var library = require("./library");
 const {events} = require("@node-red/util")
+var subflows = require("./subflow");
 var settings;
 var loader;
 
@@ -27,6 +28,8 @@ var nodeConfigCache = {};
 var moduleConfigs = {};
 var nodeList = [];
 var nodeConstructors = {};
+var subflowModules = {};
+
 var nodeTypeToId = {};
 var moduleNodes = {};
 
@@ -36,6 +39,7 @@ function init(_settings,_loader) {
     moduleNodes = {};
     nodeTypeToId = {};
     nodeConstructors = {};
+    subflowModules = {};
     nodeList = [];
     nodeConfigCache = {};
 }
@@ -225,6 +229,7 @@ function removeNode(id) {
     config.types.forEach(function(t) {
         var typeId = nodeTypeToId[t];
         if (typeId === id) {
+            delete subflowModules[t];
             delete nodeConstructors[t];
             delete nodeTypeToId[t];
         }
@@ -393,6 +398,27 @@ function registerNodeConstructor(nodeSet,type,constructor) {
     events.emit("type-registered",type);
 }
 
+function registerSubflow(nodeSet, subflow) {
+    var nodeSetInfo = getFullNodeInfo(nodeSet);
+
+    const result = subflows.register(nodeSet,subflow);
+
+    if (subflowModules.hasOwnProperty(result.type)) {
+        throw new Error(result.type+" already registered");
+    }
+
+    if (nodeSetInfo) {
+        if (nodeSetInfo.types.indexOf(result.type) === -1) {
+            nodeSetInfo.types.push(result.type);
+            nodeTypeToId[result.type] = nodeSetInfo.id;
+        }
+        nodeSetInfo.config = result.config;
+    }
+    subflowModules[result.type] = result;
+    events.emit("type-registered",result.type);
+    return result;
+}
+
 function getAllNodeConfigs(lang) {
     if (!nodeConfigCache[lang]) {
         var result = "";
@@ -447,7 +473,7 @@ function getNodeConstructor(type) {
     }
 
     if (!config || (config.enabled && !config.err)) {
-        return nodeConstructors[type];
+        return nodeConstructors[type] || subflowModules[type];
     }
     return null;
 }
@@ -457,6 +483,7 @@ function clear() {
     moduleConfigs = {};
     nodeList = [];
     nodeConstructors = {};
+    subflowModules = {};
     nodeTypeToId = {};
 }
 
@@ -613,6 +640,7 @@ var registry = module.exports = {
     registerNodeConstructor: registerNodeConstructor,
     getNodeConstructor: getNodeConstructor,
 
+    registerSubflow: registerSubflow,
 
     addModule: addModule,