import { CodeTabs, CodeTab } from "docs-ui"

export const metadata = {
  title: `Customer Module`,
}

# {metadata.title}

The Customer Module is the `@medusajs/customer` NPM package that provides customer-related features in your Medusa and Node.js applications.

## Features

### Customer Management

With the Customer Module, store and manage customers in your store.

```ts
const customer = await customerModuleService.create({
  first_name: "Peter",
  last_name: "Hayes",
  email: "peter.hayes@example.com",
})
```

### Customer Organization

You can organize customers into groups. This has a lot of benefits and supports more use cases, such as provide discounts for specific customer groups using the Promotion Module.

```ts
const customerGroup =
  await customerModuleService.createCustomerGroup({
    name: "VIP",
  })

await customerModuleService.addCustomerToGroup({
  customer_id: "cus_123",
  customer_group_id: customerGroup.id,
})
```

---

## Configure Customer Module

After installing the `@medusajs/customer` package in your Medusa application, add it to the `modules` object in `medusa-config.js`:

```js title="medusa-config.js"
const modules = {
  // ...
  customer: {
    resolve: "@medusajs/customer",
  },
}
```

---

## How to Use Customer Module's Service

You can use the Customer Module's main service by resolving from the Medusa container the resource `ModuleRegistrationName.CUSTOMER` imported from `@medusajs/modules-sdk`.

For example:

<CodeTabs groupId="resource-type">
  <CodeTab label="API Route" value="api-route">

  ```ts title="src/api/store/custom/route.ts"
  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
  import { ICustomerModuleService } from "@medusajs/types"
  import { ModuleRegistrationName } from "@medusajs/modules-sdk"

  export async function GET(
    request: MedusaRequest,
    res: MedusaResponse
  ) {
    const customerModuleService: ICustomerModuleService =
      request.scope.resolve(ModuleRegistrationName.CUSTOMER)

    res.json({
      customers: await customerModuleService.list(),
    })
  }
  ```

  </CodeTab>
  <CodeTab label="Subscriber" value="subscribers">

  ```ts title="src/subscribers/custom-handler.ts"
  import { SubscriberArgs } from "@medusajs/medusa"
  import { ICustomerModuleService } from "@medusajs/types"
  import { ModuleRegistrationName } from "@medusajs/modules-sdk"

  export default async function subscriberHandler({
    container,
  }: SubscriberArgs) {
    const customerModuleService: ICustomerModuleService =
      container.resolve(ModuleRegistrationName.CUSTOMER)

    const customers = await customerModuleService.list()
  }
  ```

  </CodeTab>
  <CodeTab label="Workflow Step" value="workflow-step">

  ```ts title="src/workflows/hello-world/step1.ts"
  import { createStep } from "@medusajs/workflows-sdk"
  import { ICustomerModuleService } from "@medusajs/types"
  import { ModuleRegistrationName } from "@medusajs/modules-sdk"

  const step1 = createStep("step-1", async (_, context) => {
    const customerModuleService: ICustomerModuleService =
      context.container.resolve(ModuleRegistrationName.PRODUCT)

    const customers = await customerModuleService.list()
  })
  ```

  </CodeTab>
</CodeTabs>
