Add extend_

Author: grant

src/Service.gs

@@ -268,7 +268,7 @@ Service_.prototype.getAuthorizationUrl = function() {
     redirect_uri: redirectUri,
     state: state
   };
-  params = _.extend(params, this.params_);
+  params = extend_(params, this.params_);
   return buildUrl_(this.authorizationBaseUrl_, params);
 };
 
@@ -298,7 +298,7 @@ Service_.prototype.handleCallback = function(callbackRequest) {
     'Accept': this.tokenFormat_
   };
   if (this.tokenHeaders_) {
-    headers = _.extend(headers, this.tokenHeaders_);
+    headers = extend_(headers, this.tokenHeaders_);
   }
   var tokenPayload = {
     code: code,
@@ -471,7 +471,7 @@ Service_.prototype.refresh = function() {
     'Accept': this.tokenFormat_
   };
   if (this.tokenHeaders_) {
-    headers = _.extend(headers, this.tokenHeaders_);
+    headers = extend_(headers, this.tokenHeaders_);
   }
   var tokenPayload = {
       refresh_token: token.refresh_token,
@@ -593,7 +593,7 @@ Service_.prototype.exchangeJwt_ = function() {
     'Accept': this.tokenFormat_
   };
   if (this.tokenHeaders_) {
-    headers = _.extend(headers, this.tokenHeaders_);
+    headers = extend_(headers, this.tokenHeaders_);
   }
   var response = UrlFetchApp.fetch(this.tokenUrl_, {
     method: 'post',

src/Utilities.gs

@@ -54,3 +54,19 @@ function validate_(params) {
 function getTimeInSeconds_(date) {
   return Math.floor(date.getTime() / 1000);
 }
+
+/**
+ * Copy all of the properties in the source objects over to the
+ * destination object, and return the destination object.
+ * @param {Object} destination The combined object.
+ * @param {Object} source The object who's properties are copied to the destination.
+ * @returns {Object} A combined object with the desination and source properties.
+ * @see http://underscorejs.org/#extend
+ */
+function extend_(destination, source) {
+  var keys = Object.keys(source);
+  for (var i = 0; i < keys.length; ++i) {
+    destination[keys[i]] = source[keys[i]];
+  }
+  return destination;
+}

test/test.js

@@ -17,7 +17,6 @@ var options = {
 };
 var OAuth2 = gas.require('./src', mocks, options);
 
-
 describe('Service', function() {
   describe('#getToken()', function() {
     it('should load from the in-memory store', function() {
@@ -110,3 +109,22 @@ describe('Service', function() {
     });
   });
 });
+
+describe('Utilities', function() {
+  describe('#extend_()', function() {
+    var extend_ = OAuth2.extend_;
+    var baseObj = {foo: [3]}; // An object with a non-primitive key-value
+    it('should extend (left) an object', function() {
+      var o = extend_(baseObj, {bar: 2});
+      assert.deepEqual(o, {foo: [3], bar: 2});
+    });
+    it('should extend (right) an object', function() {
+      var o = extend_({bar: 2}, baseObj);
+      assert.deepEqual(o, {foo: [3], bar: 2});
+    });
+    it('should extend (merge) an object', function() {
+      var o = extend_(baseObj, {foo: [100], bar: 2, baz: {}});
+      assert.deepEqual(o, {foo: [100], bar: 2, baz: {}});
+    });
+  });
+});