Made it possible to pass along the installationId (string) as property on the backbone style options object (especially on login() and signup().

Author: wuotr

src/CoreManager.js

@@ -21,6 +21,7 @@ import type { PushData } from './Push';
 type RequestOptions = {
   useMasterKey?: boolean;
   sessionToken?: string;
+  installationId?: string;
 };
 type AnalyticsController = {
   track: (name: string, dimensions: { [key: string]: string }) => ParsePromise;

src/ParseUser.js

@@ -365,6 +365,9 @@ export default class ParseUser extends ParseObject {
     if (options.hasOwnProperty('useMasterKey')) {
       signupOptions.useMasterKey = options.useMasterKey;
     }
+    if (options.hasOwnProperty('installationId')) {
+      signupOptions.installationId = options.installationId;
+    }
 
     var controller = CoreManager.getUserController();
     return controller.signUp(
@@ -395,6 +398,9 @@ export default class ParseUser extends ParseObject {
     if (options.hasOwnProperty('useMasterKey')) {
       loginOptions.useMasterKey = options.useMasterKey;
     }
+    if (options.hasOwnProperty('installationId')) {
+      loginOptions.installationId = options.installationId;
+    }
 
     var controller = CoreManager.getUserController();
     return controller.logIn(this, loginOptions)._thenRunCallbacks(options, this);

src/RESTController.js

@@ -17,13 +17,15 @@ import Storage from './Storage';
 export type RequestOptions = {
   useMasterKey?: boolean;
   sessionToken?: string;
+  installationId?: string;
 };
 
 export type FullOptions = {
   success?: any;
   error?: any;
   useMasterKey?: boolean;
   sessionToken?: string;
+  installationId?: string;
 };
 
 var XHR = null;
@@ -181,9 +183,16 @@ const RESTController = {
       payload._RevocableSession = '1';
     }
 
-    var installationController = CoreManager.getInstallationController();
+    var installationId = options.installationId;
+    var installationIdPromise;
+    if (installationId && typeof installationId === 'string') {
+      installationIdPromise = ParsePromise.as(installationId);
+    } else {
+      var installationController = CoreManager.getInstallationController();
+      installationIdPromise = installationController.currentInstallationId();
+    }
 
-    return installationController.currentInstallationId().then((iid) => {
+    return installationIdPromise.then((iid) => {
       payload._InstallationId = iid;
       var userController = CoreManager.getUserController();
       if (options && typeof options.sessionToken === 'string') {