Restock Notifications

Send notifications to subscribed customers when an item has been restocked.

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Features

• Triggers an event when a product variant has been restocked.
• Provides an endpoint to subscribe customers to receive restock notifications.
• Does not implement the email or notification sending mechanisms. Instead, it is compatible with Notification plugins such as SendGrid.

Prerequisites

• Medusa backend
• Redis
• PostgreSQL

How to Install

1. Run the following command in the directory of the Medusa backend:

npm install medusa-plugin-restock-notification

2. In medusa-config.js add the following at the end of the plugins array:

const plugins = [
  // other plugins...
  {
    resolve: `medusa-plugin-restock-notification`,
    options: {
      trigger_delay, // optional, delay time in milliseconds
      inventory_required, // minimum inventory quantity to consider a variant as restocked
    },
  },
]

3. Run the following command in the directory of the Medusa backend to run the plugin's migrations:

medusa migrations run

Test the Plugin

1. Run the following command in the directory of the Medusa backend to run the backend:

npm run start

2. Subscribe an email or identification username (depends on your notification service) to receive restock notifications using the endpoint /restock-notifications/variants/<variant_id>. <variant_id> is the ID of the variant you're subscribing to.

2. Change the inventory quantity of a product variant based on the restock threshold you've set, and see the event restock-notification.restocked triggered.

Additional Information

API endpoint

The plugin exposes an endpoint /restock-notifications/variants/:variant_id to sign emails up for restock notifications. It accepts the following request body:

{
  "email": "customer@test.com"
}

The endpoint responds with 200 OK on successful signups. If a signup for an already in stock item is attempted the endpoint will have a 400 response code.

Restock events

The plugin listens for the product-variant.updated call and emits a restock-notification.restocked event when a variant with restock signups become available.

The data sent with the restock-notification.restocked event are:

• variant_id: The ID of the variant to listen for restock events for.
• emails: An array of emails that are to be notified of restocks.

For example:

{
  "variant_id": "variant_1234567890",
  "emails": ["seb@test.com", "oli@test.com"]
}