Refactor nodejs generated code structure (#4909)

* read directly from templates

* refactor nodejs structure

* dont inject into global scope

* move to 2 spaces consistently

samples/server/petstore/nodejs/service/UserService.js

@@ -0,0 +1,136 @@
+'use strict';
+
+
+/**
+ * Create user
+ * This can only be done by the logged in user.
+ *
+ * body User Created user object
+ * no response value expected for this operation
+ **/
+exports.createUser = function(body) {
+  return new Promise(function(resolve, reject) {
+    resolve();
+  });
+}
+
+
+/**
+ * Creates list of users with given input array
+ * 
+ *
+ * body List List of user object
+ * no response value expected for this operation
+ **/
+exports.createUsersWithArrayInput = function(body) {
+  return new Promise(function(resolve, reject) {
+    resolve();
+  });
+}
+
+
+/**
+ * Creates list of users with given input array
+ * 
+ *
+ * body List List of user object
+ * no response value expected for this operation
+ **/
+exports.createUsersWithListInput = function(body) {
+  return new Promise(function(resolve, reject) {
+    resolve();
+  });
+}
+
+
+/**
+ * Delete user
+ * This can only be done by the logged in user.
+ *
+ * username String The name that needs to be deleted
+ * no response value expected for this operation
+ **/
+exports.deleteUser = function(username) {
+  return new Promise(function(resolve, reject) {
+    resolve();
+  });
+}
+
+
+/**
+ * Get user by user name
+ * 
+ *
+ * username String The name that needs to be fetched. Use user1 for testing. 
+ * returns User
+ **/
+exports.getUserByName = function(username) {
+  return new Promise(function(resolve, reject) {
+    var examples = {};
+    examples['application/json'] = {
+  "id" : 123456789,
+  "lastName" : "aeiou",
+  "phone" : "aeiou",
+  "username" : "aeiou",
+  "email" : "aeiou",
+  "userStatus" : 123,
+  "firstName" : "aeiou",
+  "password" : "aeiou"
+};
+    if (Object.keys(examples).length > 0) {
+      resolve(examples[Object.keys(examples)[0]]);
+    } else {
+      resolve();
+    }
+  });
+}
+
+
+/**
+ * Logs user into the system
+ * 
+ *
+ * username String The user name for login
+ * password String The password for login in clear text
+ * returns String
+ **/
+exports.loginUser = function(username,password) {
+  return new Promise(function(resolve, reject) {
+    var examples = {};
+    examples['application/json'] = "aeiou";
+    if (Object.keys(examples).length > 0) {
+      resolve(examples[Object.keys(examples)[0]]);
+    } else {
+      resolve();
+    }
+  });
+}
+
+
+/**
+ * Logs out current logged in user session
+ * 
+ *
+ * no response value expected for this operation
+ **/
+exports.logoutUser = function() {
+  return new Promise(function(resolve, reject) {
+    resolve();
+  });
+}
+
+
+/**
+ * Updated user
+ * This can only be done by the logged in user.
+ *
+ * username String name that need to be deleted
+ * body User Updated user object
+ * no response value expected for this operation
+ **/
+exports.updateUser = function(username,body) {
+  return new Promise(function(resolve, reject) {
+    resolve();
+  });
+}
+