Tag Archives: Google Apps

[Q&A] Behind the scenes with Lucidchart: building new diagramming add-on in Google Slides

You might have seen that we recently announced new Google Slides add-ons. We worked closely with several technology partners to build these new add-on solutions to help speed up workflows. 

One partner, Lucidchart, worked closely with Google to create a new integration that brings added diagramming functionality to Slides. We sat down with Tim Winchester, engineering lead at Lucidchart, to learn more about how his team built the new Lucidchart add-on for Slides.

Tell us about the Google Slides add-on you built for Lucidchart. 

We built it as a sidebar add-on that allows users to insert diagrams directly into Google Slides from within Slides (instead of having to export diagrams from Lucidchart). You can also create a new Lucidchart diagram from within Slides, and simply select “Back to Slides” once you’re finished creating your diagram in the Lucidchart editor. You can modify an existing diagram by clicking “Edit” within Slides. This option will direct you to the Lucidchart editor so you can revise as needed. Once you’ve finished revising, or any time you know a diagram has been updated in Lucidchart, select the refresh button from the Lucidchart Diagrams sidebar.

What prompted you to create your add-on? 

Specifically, how did you envision your add-on would improve user experience? Lucidchart is a visual communication platform, but we know our users sometimes need to have their diagrams available in other places. One of the most popular uses for Lucidchart is in presentations, so an add-on for Slides was a natural fit.

Tell us about how you built your solution. 

Since we already had existing add-ons for Docs and Sheets, this project was less about building from scratch and more about adapting what we already had, then doing rewrites as needed. We started by abstracting app-specific functionality of our existing add-ons into a pluggable IntegratedApp interface. We then implemented the interface for Slides using the new SlidesApp API. Once we had reached feature parity, we created a few new additions, such as a “Refresh All Inserted Diagrams” button, which users could find more easily than a top bar menu entry.

At the same time, the Lucidchart add-on was undergoing a major UI overhaul, which was the most challenging and time-intensive part of the project. Because we liked the results of the UI update in Slides, we refactored the add-on code to make it more generalizable, then ported it back to our Docs and Sheets add-ons.

Did anything surprise you during the build? 

As a security measure, the sidebar iframe can only render elements within its borders, so we couldn’t simply throw a <div> into the center of the screen in client code. Instead, we had to fire an event that the Apps Script backend would handle to create a modal dialog, using printing scriptlets to add whatever data we needed into the dialog’s HTML. Thus, any JS object sent from the sidebar to a modal has to be serialized and deserialized in the process, which means that the sidebar cannot directly detect any events emitted by the modal.

Do you have any code snippets that you can share? 

Because we have multiple Google Apps Script add-ons that share lots of functionality, it was very useful to concentrate app-specific code and strings into a wrapper object (called IntegratedApp), which we then referenced elsewhere in the codebase instead of calling SlidesApp directly. So, in the click handler for the insert button, instead of writing this...

...we write this.

And then we keep the app-specific implementation in our IntegratedApp object (abridged for clarity):
var IntegratedApp = {
// direct mapping to function
createAddonMenu: SlidesApp.getUi().createAddonMenu.bind(SlidesApp.getUi()),

// wrapper to create consistent behavior across apps
insertImage: function(image) {
return SlidesApp.getActivePresentation()

// app-specific strings
phrases: {
docType: 'Slide',
name: 'Google Slides',
nameWithDocType: 'Google Slides Presentation'

This technique allows us to keep the same UI code and business logic across apps; we only need to change the implementation of the IntegratedApp object. So in Sheets (for example), our IntegratedApp.insertImage() function becomes:
insertImage: function(image) {
var sheet = SpreadsheetApp.getActiveSheet();
var cell = sheet.getActiveCell();

sheet.insertImage(image, cell.getColumn(), cell.getRow());

What advice would you give other developers looking to build similar add-ons? 

If you are planning to develop multiple similar add-ons that mainly differ in the G Suite app with which they integrate, you should find this technique of reducing the overall code amount by isolating duplicative code immensely useful.

After completing the first add-on, creating another add-on for a new G Suite app is just a matter of updating a new copy of IntegratedApp to work with the new app; the rest of the codebase can be commonly shared. In our case, it means that the updated UI was easily added to our Docs and Sheets add-on after we completed the Slides add-on.

Learn more about how you can create your own Slides add-ons or choose from a number of publicly available APIs to customize your G Suite applications. If you’re interested in becoming a Google Cloud technology partner, you can also join our partnership program.

Generating Google Slides from images using Apps Script

Today, we announced a collection of exciting new features in Google Slides—among these is support for Google Apps Script. Now you can use Apps Script for Slides to programmatically create and modify Slides, plus customize menus, dialog boxes and sidebars in the user interface.

Programming presentations with Apps Script

Presentations have come a long way—from casting hand shadows over fires in caves to advances in lighting technology (magic lanterns) to, eventually, (in)famous 35mm slide shows of your Uncle Bob's endless summer vacation. More recently, we have presentation software—like Slides—and developers have been able to write applications to create or update them. This is made even easier with the new Apps Script support for Google Slides. In the latest G Suite Dev Show episode, we demo this new service, walking you through a short example that automatically creates a slideshow from a collection of images.
To keep things simple, the chosen images are already available online, accessible by URL. For each image, a new (blank) slide is added then the image is inserted. The key to this script are two lines of JavaScript (given an existing presentation and a link to each image):

var slide = presentation.appendSlide(SlidesApp.PredefinedLayout.BLANK);
var image = slide.insertImage(link);

The first line of code adds a new slide while the other inserts an image on the new slide. Both lines are repeated for each image in the collection. While this initial, rudimentary solution works, the slide presentation created doesn't exactly fit the bill. It turns out that adding a few more lines make the application much more useful. See the video for all the details.

Getting started 

To get started, check the documentation to learn more about Apps Scripts for Slides, or check out the Translate and Progress Bar sample Add-ons. If you want to dig deeper into the code sample from our video, take a look at the corresponding tutorial. And, if you love watching videos, check out our Apps Script video library or other G Suite Dev Show episodes. If you wish to build applications with Slides outside of the Apps Script environment and want to use your own development tools, you can do so with the Slides (REST) API—check out its documentation and video library.

With all these options, we look forward to seeing the applications you build with Google Slides!

Back to school with enhancements to the Classroom API

Google Classroom makes it easy for teachers and students to use the edtech tools they love, and that’s not just limited to Google tools. With the Classroom API, hundreds of developers have built integrations with Classroom that make it easier for admins and teachers to manage classes, share content and more.

One popular way that applications integrate with Classroom is by re-using Classroom rosters—teachers can import their classes with a click and students don’t have to have a new login. Today, we’re making it easier for developers to keep rosters in-sync between their apps and Classroom by launching real-time notifications of changes.

Now, an application can now receive roster changes for a domain, or for an individual course. Powered by Google Cloud Pub/Sub, a state-of-the-art messaging service for passing information between applications, developers no longer have to poll various Classroom API endpoints for changes, which gives teachers and students a more seamless experience. If a new student joins or leaves a Classroom class, that roster change can be automatically applied across applications.

How Flat Education syncs rosters in real-time 

Flat Education, a collaborative music notation app, uses the new updates to instantly update class rosters. Before, when teachers and students accessed the Flat Education application, it would poll the Classroom API for changes and then make updates, delaying data. Now, roster data can be refreshed instantly.
With today's Classroom API update, applications can sync roster data instantly. When a new student joins Google Classroom (bottom left), the student is instantly added to the corresponding music class in Flat Education (top right).

We’re also making the Classroom API more comprehensive with additional enhancements so you can:
  • Create and update announcements. Last year, we launched the ability for external applications to access and create assignments and questions. This update gives applications access to all the posts in Classroom. 
  • Create and update individualized posts. Earlier this year, we made it possible for teachers to post to individual students in Classroom and now, applications can do the same programmatically. This is especially helpful for applications that help teachers differentiate and individualize learning.
For more details on what you can build with the Classroom API, check out the documentation. You can also ask questions (or answer them!) on StackOverflow using the google-classroom tag, and report bugs or feature requests via the issue tracker.

Lastly, let us know what you're building using the #withClassroom hashtag on Twitter or Google+.

Monitoring the Apps Script issue tracker…with Apps Script

Apps Script is just as popular inside Google as it is among external users and developers. In fact, there are more than 70,000 weekly active scripts written by thousands of Googlers. One of our many uses for Apps Script at Google is to automate and monitor our internal issue tracker.

Your business depends on Apps Script...so does ours 

In spring of this year, we migrated our G Suite issue trackers to a new system based on our internal tracker. This carries a lot of benefits, including improving our ability to track how issues reported from outside of Google relate to bugs and features we’re working on internally. We also have an internal Apps Script API that talks to our issue tracker, which we can now use to work with issues reported from outside of Google.

As soon as the migration was finished, we put Apps Script to work monitoring…itself. Now we have a script in place that monitors Apps Script issues as they are reported and upvoted on the public tracker. When we see an issue that’s having widespread or sudden impact, the script generates an alert that we can then investigate. With the help of our large, active community of developers, and leveraging Apps Script, we’re now able to identify and respond to issues more quickly.

There’s no substitute for independent monitoring, and our Apps Script-based approach isn’t the first or the last line of defense. Instead, this new script helps us catch anything that our monitoring systems miss by listening to what developers are saying on the tracker.

If you see something, say something 

Please help us keep Apps Script humming! When you notice a problem, search the issue tracker for it and file an issue if it's new. Click the star to let us know you’re affected and leave a comment with instructions to reproduce, along with any other relevant details. Those instructions and other details help us respond to the issues more effectively, so please be sure to include them.

Happy scripting!

Stackdriver Logging for Google Apps Script is now available

Google Apps Script has always provided a simple logging tool—the Logger service—to help developers better test their scripts. This works for many simple use cases, but developers need other ways to log messages and errors, particularly when:
  • Troubleshooting or analyzing scripts across multiple executions
  • Working on a script or add-on with multiple users 
  • Looking for trends or insights about their scripts and users
To make Apps Script a friendlier environment for developers, we are announcing general availability of a new integration with Google Stackdriver. This is in addition to the pre-existing Logger service, which is still available.

Using Stackdriver Logging in Google Apps Script

Log messages can now be sent to Stackdriver Logging using the familiar console.log(), console.info(), etc. functions. You can also instruct Apps Script to log messages and stack traces for all exceptions, which also become available for analysis in Stackdriver Error Reporting by simply checking a box. No need to add a single extra line of code.

In Stackdriver, logs are kept for 7 days for free, and the premium tier offers 30-day retention. Powerful search and filtering are available to quickly find log entries by text content or metadata, and developers can also choose to export logs to BigQuery, Cloud Storage, and Cloud Pub/Sub for further analysis, long term conservation, and custom workflows.

Log messages and errors are reported for all users of a script, with a unique but obfuscated identifier assigned to each user. This means log entries can be aggregated anonymously per user, for example allowing developers to count unique users impacted by an issue or analyze user behavior, but without logging users’ personally identifying information.

Developers get some of these aggregated analyses for free. In the Stackdriver Error Reporting tab of the developer console, you can see recurring errors and the numbers of users impacted. You can even subscribe to receive an email alert when a new type of error is detected.

How developers are using Stackdriver Logging

Developers of scripts and add-ons have started to rely more on more on this new logging capability. Romain Vialard, creator of Yet Another Mail Merge, a popular Google Sheets add-on, is using Stackdriver Logging to time the execution of his add-on, exporting data to BigQuery to perform aggregations and analyze trends. Read this tutorial to learn how to export logs to BigQuery and run queries to analyze how users are interacting with your script.

Stackdriver Logging is one of the ways we’re making Apps Script a more manageable platform for developers. We hope that it and other features coming soon make Apps Script developers more productive and their scripts, add-ons and integrations more robust.

You can read more about how to enable and use the Stackdriver integration by reading Apps Script’s logging documentation.

About the authors 

Romain Vialard is a Google Developer Expert. After some years spent as a consultant, he is now focused on products for G Suite (formerly Google Apps) users, including add-ons such as Yet Another Mail Merge and Form Publisher.

Paul McReynolds is a Product Manager at Google focused on Apps Script and G Suite Marketplace. Previously a startup founder and CTO, Paul believes that the easy things need to be easy or the hard things don’t get done. At Google, he's excited to be a part of the company that makes solving problems for business fun again.

Editor's note: Yet Another Mail Merge and Form Publisher are not created, sponsored, or supported by Google.

Introducing the Slides API Codelab

Last fall, we launched the Google Slides API. Since then, partners, developers and others have been building apps and tools to programmatically create slides that work across desktop and mobile, like the ever popular md2googleslides.

We recently released the Slides API Codelab, which walks you through an example of using Google’s BigQuery and Slide APIs to analyze 3.5 million repositories and create a “Top 10 OSS licenses” presentation. The codelab is a great exercise for learning the Slides API, especially if you have an interest in big data, automating the creation of presentations or open source.
Preview of our Slides Codelab

Getting started with the Slides API Codelab 

To get started, clone the repo. After running the starter script, you’ll find that creating a presentation is divided up into contained steps. These “TODOs” are shown when running the sample app in the start directory.
-- Start generating slides. --
TODO: Get Client Secrets
TODO: Authorize
TODO: Get Data from BigQuery
TODO: Create Slides
TODO: Open Slides
-- Finished generating slides. --

To query GitHub, BigQuery has a public dataset all ready just for you! BigQuery allows you to query massive datasets on Google’s infrastructure in seconds. On bigquery.cloud.google.com, you can explore BigQuery’s public datasets or upload your own. In this codelab, we’re interested in open source licenses, so we'll query public repos on GitHub and grab their licenses.
WITH AllLicenses AS (
SELECT * FROM `bigquery-public-data.github_repos.licenses`
COUNT(*) AS count,
ROUND((COUNT(*) / (SELECT COUNT(*) FROM AllLicenses)) * 100, 2) AS percent
FROM `bigquery-public-data.github_repos.licenses`
GROUP BY license
Our GitHub Open Source Licenses Query
With an infinite number of public and private datasets out there, imagine all the data you can analyze with BigQuery and all the slide decks you can auto-generate with the Google Slides API! The goal of the Slides API Codelab is to get you up-to-speed quickly using both. For issues or questions regarding the Slides API or this codelab, ask us a question on GitHub or Stack Overflow.

We can't wait to see what you build.

What’s new for shortcuts and widgets in Android O

Posted by Gloria Liou, Associate Product Manager Intern

Why use shortcuts and widgets?

One of our favorite features in Android O is the ability to pin shortcuts and widgets for your app onto the launcher through deep linking.

Shortcuts let users quickly start a specific task, while widgets give users instant access to specific actions and information from your app. Users want to get things done, and get things done fast - shortcuts and widgets are a way to help them and to increase user engagement with your content.

To pin a shortcut or widget, users long press your app's icon for options and drag and drop the selected item to a location of their choice.

Dynamic / static shortcuts
Pinned shortcuts

Adding shortcuts and widgets from within your app

The API has a new flow for adding shortcuts and widgets from within your app. The new method uses a modal dialog, deprecating the old method of using a broadcast, which will not work on O devices.

That's not all. We've made improvements to the user interface and experience. In the old experience, there was no app icon on the shortcut, so users had no idea which app the shortcut was from. Marking shortcuts with the app icon provides better branding while protecting users from potential malware.

Old shortcut
New shortcut

There is also a new option to add a specialized activity to help users create shortcuts. The activity is complete with custom options and confirmation.

With these new additions and improvements, users will be more likely to use your shortcuts and widgets, leading to more meaningful and impactful engagement with your app and happier, more productive users.

To learn more, head over to the shortcuts and widgets page on the Android Developers website.

New security protections to reduce risk from unverified apps

We’re constantly working to secure our users and their data. Earlier this year, we detailed some of our latest anti-phishing tools and rolled-out developer-focused updates to our app publishing processes, risk assessment systems, and user-facing consent pages. Most recently, we introduced OAuth apps whitelisting in G Suite to enable admins to choose exactly which third-party apps can access user data.

Over the past few months, we’ve required that some new web applications go through a verification process prior to launch based upon a dynamic risk assessment.

Today, we’re expanding upon that foundation, and introducing additional protections: bolder warnings to inform users about newly created web apps and Apps Scripts that are pending verification. Additionally, the changes we're making will improve the developer experience. In the coming months, we will begin expanding the verification process and the new warnings to existing apps as well.

Protecting against unverified apps 

Beginning today, we’re rolling out an “unverified app” screen for newly created web applications and Apps Scripts that require verification. This new screen replaces the “error” page that developers and users of unverified web apps receive today.

The “unverified app” screen precedes the permissions consent screen for the app and lets potential users know that the app has yet to be verified. This will help reduce the risk of user data being phished by bad actors.

The "unverified app" consent flow

This new notice will also help developers test their apps more easily. Since users can choose to acknowledge the ‘unverified app’ alert, developers can now test their applications without having to go through the OAuth client verification process first (see our earlier post for details).

Developers can follow the steps laid out in this help center article to begin the verification process to remove the interstitial and prepare your app for launch.

Extending security protections to Google Apps Script 

We’re also extending these same protections to Apps Script. Beginning this week, new Apps Scripts requesting OAuth access to data from consumers or from users in other domains may also see the "unverified app" screen. For more information about how these changes affect Apps Script developers and users, see the verification documentation page.

Apps Script is proactively protecting users from abusive apps in other ways as well. Users will see new cautionary language reminding them to “consider whether you trust” an application before granting OAuth access, as well as a banner identifying web pages and forms created by other users.
Updated Apps Script pre-OAuth alert with cautionary language
Apps Script user-generated content banner

Extending protections to existing apps 

In the coming months, we will continue to enhance user protections by extending the verification process beyond newly created apps, to existing apps as well. As a part of this expansion, developers of some current apps may be required to go through the verification flow.

To help ensure a smooth transition, we recommend developers verify that their contact information is up-to-date. In the Google Cloud Console, developers should ensure that the appropriate and monitored accounts are granted either the project owner or billing account admin IAM role. For help with granting IAM roles, see this help center article.

In the API manager, developers should ensure that their OAuth consent screen configuration is accurate and up-to-date. For help with configuring the consent screen, see this help center article

We’re committed to fostering a healthy ecosystem for both users and developers. These new notices will inform users automatically if they may be at risk, enabling them to make informed decisions to keep their information safe, and will make it easier to test and develop apps for developers.

Identifying app usage in your Google Drive audit logs

If you’re a G Suite admin (or a developer creating apps for admins), it’s important to understand the various applications your company’s employees are using and how they’re accessing them. Today, we’re making that easier by introducing app identification (i.e. originating_app_id) in the Google Drive audit logs within the Admin SDK Reports API.

Now, your apps will be able to determine whether an activity logged was performed by a user in the Drive Android app, Drive iOS app, Google Chrome, or through a variety of other third-party apps that leverage, modify or create files within Google Drive, like Smartsheet or Asana. This will give you a better sense of the apps being used in your organization, as well as the extent and context of that usage.

Note that App IDs that show up in the logs will be numeric. Should you want to retrieve app names, a separate request using the Google Drive REST API is needed. If you already retrieve information through the Drive activity request, you should start seeing the originating_app_ids show up in your logs. Here are a pair of HTTP requests you can use to query this information:



To learn more about this new feature, take a look at the documentation, then integrate into your code so you and other G Suite admins can gain a better understanding of app usage in your domain(s). We look forward to seeing what you build!

Google People API now supports updates to Contacts and Contact Groups

Starting today, the Google People API will get new endpoints for contacts and contact groups. Last year, we launched the Google People API with read-only endpoints with plans to eventually replace the old Contacts API. We’re one step closer to that goal by adding write endpoints that allow developers to create, delete and update a single contact. In addition, there are new contact group endpoints that allow developers to read and write contact groups.

Applications need to be authorized to access the API so to get started, you will need to create a project on the Google Developers Console with the People API enabled to get access to the service. All of the steps to do so are here. If you’re new to the Google APIs and/or the Developers Console, check out this video, the first in a series of videos to help you get up-to-speed.

Once you’re authorized, you can simply create new contacts like this (using the Google APIs Client Library for Java):
Person contactToCreate = new Person();

List names = new ArrayList<>();
names.add(new Name().setGivenName("John").setFamilyName("Doe"));

Person createdContact =

The scope your app needs to authorize with is https://www.googleapis.com/auth/contacts. Full documentation on the people.create method is available here. You can update an existing contact like this:

String resourceName = "people/c12345"; // existing contact resource name
Person contactToUpdate = peopleService.people().get(resourceName)

List emailAddresses = new ArrayList<>();
emailAddresses.add(new EmailAddress().setValue("john.doe@gmail.com"));

Person updatedContact = peopleService.people().updateContact(contactToUpdate)

Full documentation on the people.update  method is available here. We look forward to seeing what you can do with these new features allowing you to modify contacts. To learn more about the People API, check out the official documentation here.