isabella232 / dialogflow-google-sign-in-java

Google Sign-In sample (using Dialogflow) in Java

Actions on Google: Account Linking with Google Sign-In Sample

This sample demonstrates Actions on Google features for use on Google Assistant including account linking and Google Sign In -- using the Java client library, Firebase Authentication, and deployed on App Engine.

Setup Instructions

Prerequisites

1. Download & install the Google Cloud SDK
2. Gradle with App Engine Plugin
   • Run gcloud auth application-default login with your Google account
   • Install and update the App Engine component,gcloud components install app-engine-java
   • Update other components, gcloud components update

Configuration

Actions Console

1. From the Actions on Google Console, New project (this will become your Project ID) > Create project > under More options > Conversational.
2. From the top navigation menu under Develop > Account linking (left nav):
   • Account creation > select Yes, allow users to sign up for new accounts via voice.
   • Linking type > select Google Sign In.
   • Client information > copy Client ID > Save.
3. In src/main/java/com/example/Constants.java
   • Update clientId to the value copied in the previous step
   • Update databaseUrl to https://<YOUR-PROJECT-ID>.firebaseio.com with your Project ID.
4. From the top navigation menu under Develop > Actions (left nav) > Add your first action > BUILD (this will bring you to the Dialogflow console) > Select language and time zone > CREATE.
5. In Dialogflow, go to Settings ⚙ > Export and Import > Restore from zip.
   • Follow the directions to restore from the agent.zip file in this repo.

Firestore Database

1. From the Firebase console, find and select your Actions on Google Project ID
2. In the left navigation menu under Develop section > Database > Create database button > Select Start in test mode > Enable
3. Under Develop > Authentication > Sign in method tab > Sign In Providers:
   • Select Google > Enable
   • Web SDK configuration section > copy the Web client ID value and replace the <CLIENT-ID> placeholder string found in src/main/webapp/webapp.html with your web client ID.
   • Then Save
4. Project Overview > under Add Firebase to your app > select the web icon > copy the config contents into src/main/webapp/webapp.html

App Engine Deployment & Webhook Configuration

1. Configure the gcloud CLI and set your Google Cloud project to the name of your Actions on Google Project ID, which you can find from the Actions on Google console under Settings ⚙
   • gcloud init
2. Deploy to App Engine using Gradle:
   • gradle appengineDeploy OR
   • From within IntelliJ, open the Gradle tray and run the appEngineDeploy task.

Dialogflow Console

Return to the Dialogflow Console, from the left navigation menu under Fulfillment > Enable Webhook, set the value of URL to https://<YOUR_PROJECT_ID>.appspot.com > Save.

1. From the left navigation menu, click Integrations > Integration Settings under Google Assistant > Enable Auto-preview changes > Test to open the Actions on Google simulator then say or type Talk to my test app.

Configure Google Sign-In Credentials

1. In the Google Cloud Console Credentials page > select your Project ID from the dropdown.
2. From the OAuth consent screen tab > under Authorized domains > add the domain for your deployed project, <YOUR-PROJECT-ID>.appspot.com > Save.
3. Back in the Credentials tab > OAuth 2.0 client IDs > select Web client (auto created by Google Service):
   • Under Authorized JavaScript origins, add https://<YOUR-PROJECT-ID>.appspot.com with your Project ID.
   • Under Authorized redirect URI, add https://<YOUR-PROJECT-ID>.appspot.com/webapp.html with your Project ID > Save.

Running this Sample

• You can test your Action on any Google Assistant-enabled device on which the Assistant is signed into the same account used to create this project. Just say or type, “OK Google, talk to my test app”.
• You can also use the Actions on Google Console simulator to test most features and preview on-device behavior.
• A minimal web application is published at https://<YOUR-PROJECT-ID>.appspot.com/webapp.html, you can see the favorite color value.

Troubleshooting

• If running into issues after following the above steps, clear your browser's cache and make sure pop ups are allowed.

References & Issues

• Questions? Go to StackOverflow, Assistant Developer Community on Reddit or Support.
• For bugs, please report an issue on Github.
• Actions on Google Documentation
• Webhook Boilerplate Template for Actions on Google.
• More info about Gradle & the App Engine Plugin.
• More info about deploying Java apps with App Engine.

Make Contributions

Please read and follow the steps in the CONTRIBUTING.md.

License

See LICENSE.

Terms

Your use of this sample is subject to, and by using or downloading the sample files you agree to comply with, the Google APIs Terms of Service.