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OneSignal + Supabase Sample Omni-channel Integration

OneSignal makes engaging customers simple and is the fastest, most reliable service to send push notifications, in-app messages, SMS, and emails.

This project demonstrates how to use OneSignal as an integration with Supabase to handle your messaging needs, including push notifications, SMS text messages, email, and in-app messaging. Feel free to use this sample as a reference for your own Supabase integration.

Table of Contents

• OneSignal + Supabase Sample Omni-channel Integration - Table of Contents
  • 🚦 Getting started
  • Setup OneSignal App
    • Setup iOS Platform
    • Craft an In-App Message
  • Setup Supabase Project
    • Initialize Supabase project
    • Disable email confirmation authentication
    • Edit Database Triggers
    • Create Edge Function
      • Function Implementation
    • Set Environment Variables
      • Locally
      • On Supabase
      • How to Remove Variable
    • Run Migrations
    • Deploy Edge Function
      • Hosting locally
      • To Production
    • Create Database Webhook - Example Database Webhook event
  • 🚀🚀🚀 Launch Companion App
    • Debugging
      • Inspect Supabase Edge Function Requests
      • Review Server Logs
• ❤️ Developer Community
  • Show your support

🚦 Getting started

This project assumes that you already have a few things setup.

• An existing OneSignal account. If not, create one for free.
• A Supabase account and the Supabase CLI v1.16.0 installed.
• A Firebase account, if not create one first.
• A Stripe account and the Stripe CLI v1.13.5 installed.
• A Vercel account and the Vercel CLI v28.7.0 installed (or anything capable of hosting a Next.js API).
• A working Flutter dev environment and access to a mac for iOS-specific steps.
• Deno v1.28.0 installed and configured.

Setup OneSignal App

1. From the OneSignal Dashboard, select New App/Website to create an app.
2. Name app and choose the Android platform to setup.
3. Enter FCM credentials for the Firebase project you want to handle Android notifications and choose Save & Continue.

Setup iOS Platform

iOS configuration requires substantially more effort to integrate due to needing signed certs from Apple. Due to this fact, follow this guide for detailed instructions on creating the certificate needed to use Apple's Push Notification Service (APNs).

After you have the certificate, head to the OneSignal Dashboard

1. Choose Settings -> Platforms
2. Activate the iOS card
3. Upload your certificate and enter the password you used to encrypt it. If you didn't set a password, leave the password input blank.

Craft an In-App Message

Consent is required before we can present push notifications to a user. It's recommend to use an in-app message to ask for consent because no prior consent is needed to present them. This is particularly useful in situations where a user accidentally declines consent. We have an in-depth guide explaining this strategy here.

1. Select New Message -> New In-App and name it "prompt_notification"

2. Configure an in-app message with at least one button; here's the message with two buttons I configured for this sample using our Block Editor!

3. Add the Push Permission Prompt Click Action to the primary call to action button.

4. Select Add Trigger -> In-App Trigger to present the in-app message when specific conditions are met

5. Schedule the message to start showing Immediately, to Show forever, and to show Every time trigger conditions are satisfied

6. Select Make Message Live to publish message

If you didn't name your in-app message "prompt_notification", you'll need to update the Flutter app's code to use your name.

Setup Supabase Project

Initialize Supabase project

Run this command to interactively configure a new Supabase project

supabase projects create onesignal-supabase-sample-integration -i

Disable email confirmation authentication

Supabase projects are more secure by default. The front-end client consuming this project does not support magic links. Disabling email confirmation is needed to run the companion sample app.

1. From the Supabase Dashboard, navigate to your project's Authenication pane.
2. Select Providers under the Configuration header.
3. Disable Confirm email and select Save.

Edit Database Triggers

We can rely on Supabase to automatically insert a user profile after user signup. Supabase provides Database Functions and Triggers that enable us to react to events on the database. For this sample integration, we will edit the existing function on_auth_user_created.

1. Navigate to Database -> Triggers

2. Edit the backing function by navigating to Functions and clicking the edit button located in the context-menu for the record handle_new_user.

3. Paste the 👇 script as the Defintion and select Confirm

begin
  insert into public.profiles (id, email)
  values (new.id, new.raw_user_meta_data->>'email');
  return new;
end;

Create Edge Function

The Supabase CLI's command to create a function will add the boilerplate for an edge function located in a directory with the name specified in the command, push/index.ts.

supabase functions new push-order-confirmation-to-customer

This function is responsible for calling the OneSignal API using onesignal-node-sdk.

Function Implementation

Supabase Edge Functions are executed in the Deno enfironment on the edge, so

• Functions are written in TypeScript
• You can't install packages with a package manager like npm or Yarn

Function logic is implemented in push/index.ts (Here).

We can't use a traditional package manager to install packages, so we're using esm.sh – a global CDN for npm packages – to load the onesignal-node-api module.

onesignal-supabase-sample-integration-supabase/supabase/functions/_utils/config.ts

Line 2 in 12df6f5

import * as OneSignal from "https://esm.sh/@onesignal/node-onesignal@1.0.

Deno's Deno.env object exposes the values we need.

onesignal-supabase-sample-integration-supabase/supabase/functions/_utils/config.ts

Lines 5 to 7 in 12df6f5

	export const _OnesignalAppId_ = Deno.env.get("ONESIGNAL_APP_ID")!
	const _OnesignalUserAuthKey_ = Deno.env.get("USER_AUTH_KEY")!
	export const _OnesignalRestApiKey_ = Deno.env.get("ONESIGNAL_REST_API_KEY")!

Create the OneSignal API client so we can send a request to the API.

onesignal-supabase-sample-integration-supabase/supabase/functions/_utils/config.ts

Line 12 in 12df6f5

export const onesignal = new OneSignal.DefaultApi(configuration)

Now we can configure the notification object.

onesignal-supabase-sample-integration-supabase/supabase/functions/push-order-confirmation-to-customer/index.ts

Lines 24 to 29 in 12df6f5

	const notification = new OneSignal.Notification()
	notification.app_id = _OnesignalAppId_
	notification.include_external_user_ids = [profile]
	notification.contents = {
	en: generateMessage(record.amount, record.currency),
	}

And send the notification to OneSignal to send the push notification.

onesignal-supabase-sample-integration-supabase/supabase/functions/push-order-confirmation-to-customer/index.ts

Line 30 in 12df6f5

const onesignalApiRes = await onesignal.createNotification(notification)

Set Environment Variables

Locally

Supabase will respect local environment variables set in supabase/.env.local.

Copy .env.example and fill in your keys from OneSignal app.

$ cp supabase/.env.example supabase/.env.local

On Supabase

Use the Supabase CLI to set environment variables in the Supabase project.

$ supabase secrets set test=123
Finished supabase secrets set.

How to Remove Variable

Use the Supabase CLI to remove environmental variables in the Supabase project.

$ supabase secrets unset test
Finished supabase secrets unset.

Run Migrations

💡You only need to run steps 1 since this sample includes migrations files (here).

1. Run supabase db diff and copy its output

2. Create a new migration and paste the output from the previous step into the .sql file

3. Run supabase db push to apply migrations to the hosted project

Deploy Edge Function

We can deploy edge functions to a local or production environment. Developing locally allows us to test and iterate quickly.

Hosting locally

1. Start the Supabase Docker container, navigate to the root directory of this sample project and run supabase start
2. To serve the function, run supabase functions serve push --env-file ./supabase/.env.local --debug
3. Submit a request to the endpoint making sure to use the anon key as your bearer token.

Result of running supabase start

$ supabase start
Seeding data supabase/seed.sql...
Started supabase local development setup.

API URL: http://localhost:54321
DB URL: postgresql://postgres:postgres@localhost:54322/postgres
Studio URL: http://localhost:54323
Inbucket URL: http://localhost:54324
JWT secret: super-secret-jwt-token-with-at-least-32-characters-long
anon key: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6ImFub24ifQ.625_WdcF3KHqz5amU0x2X5WWHP-OEs_4qj0ssLNHzTs
service_role key: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6InNlcnZpY2Vfcm9sZSJ9.vI9obAHOGyVVKa3pD--kJlyxp-Z2zV9UUMAhKpNLAcU

Serving a function to the local instance of Supabase.

To Production

Supabase makes deploying your project to production simple with their CLI.

supabase functions deploy push

If the command ☝️ doesn't work for you, try executing the command with the --legacy-bundle flag set.

Create Database Webhook

For complete instructions on creating a webhooks, please refer to the Supabase docs.

1. From the Database -> Webhooks page Select Create a new hook button
2. Name the hook "push-order-confirmation-to-user"
3. Set the table to orders
4. Select Insert checkbox
5. Set hook type to HTTP Request
6. Set the HTTP request method to POST
7. Set the URL to the edge function, push-order-confirmation-to-customer
8. Add a HTTP Header named Authorization and set the value to Bearer [Your Supabase project's anonKey]
9. Select Confirm confirm button to complete setup

💡We need to include the Authorization header so the edge function can verify the request. Without this header, anyone would be able to call our endpoint.

Example Database Webhook event

{
    type: "INSERT",
    table: "orders",
    record: {
      id: "796a354b-c087-4afe-8614-5a1015221d04",
      amount: 1099,
      currency: "usd",
      created_at: "2022-11-30T18:41:42.605",
      stripe_pi_id: "pi_3M9vDvKCO1JeQB0L1PGzangD",
      stripe_customer_id: "cus_MtibdpF533vFYn"
    },
    schema: "public",
    old_record: null
}

🚀🚀🚀 Launch Companion App

The companion app and supporting API can be built from source to run alongside this Supabase project.

Debugging

The Supabase dashboard presents all deployed functions along with their time of deployment and status.

Inspect Supabase Edge Function Requests

Supabase enables you to review HTTP request logs to assist with our debugging.

Review Server Logs

Our console.logs will appear here!

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❤️ Developer Community

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