Swell Find-or-Create Customer and Order

arazzo: 1.0.1
info:
  title: Swell Find-or-Create Customer and Order
  summary: Look up a customer by email and reuse it or create it, then place an order.
  description: >-
    A branching find-then-act flow that prevents duplicate customer records. The
    workflow searches accounts for a matching email using a where filter and
    branches: when a match is found it reuses that account id, and when none is
    found it creates a new account. Either branch converges on creating an order
    for the resolved account. Each step spells out its request inline so the flow
    can be read and executed without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: swellBackendApi
  url: ../openapi/swell-backend-api-openapi.yml
  type: openapi
workflows:
- workflowId: find-or-create-customer-and-order
  summary: Resolve a customer by email, creating one if absent, then place an order.
  description: >-
    Filters accounts by email; on a hit it reuses the matched account id, on a
    miss it creates a new account, then both paths create an order.
  inputs:
    type: object
    required:
    - email
    - items
    properties:
      email:
        type: string
        description: Customer email used to match an existing account.
      first_name:
        type: string
        description: First name used when creating a new account.
      last_name:
        type: string
        description: Last name used when creating a new account.
      currency:
        type: string
        description: ISO 4217 currency code for the order.
      items:
        type: array
        description: Order line items.
        items:
          type: object
  steps:
  - stepId: findAccountStep
    description: >-
      Search accounts for one whose email matches the supplied value, returning
      at most one match.
    operationId: listAccounts
    parameters:
    - name: where
      in: query
      value:
        email: $inputs.email
    - name: limit
      in: query
      value: 1
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      matchedAccountId: $response.body#/results/0/id
    onSuccess:
    - name: accountExists
      type: goto
      stepId: orderForExistingStep
      criteria:
      - context: $response.body
        condition: $.results.length > 0
        type: jsonpath
    - name: accountMissing
      type: goto
      stepId: createAccountStep
      criteria:
      - context: $response.body
        condition: $.results.length == 0
        type: jsonpath
  - stepId: orderForExistingStep
    description: Create an order for the matched existing account.
    operationId: createOrder
    requestBody:
      contentType: application/json
      payload:
        account_id: $steps.findAccountStep.outputs.matchedAccountId
        items: $inputs.items
        currency: $inputs.currency
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      orderId: $response.body#/id
      orderNumber: $response.body#/number
    onSuccess:
    - name: done
      type: end
  - stepId: createAccountStep
    description: Create a new account because no existing account matched the email.
    operationId: createAccount
    requestBody:
      contentType: application/json
      payload:
        email: $inputs.email
        first_name: $inputs.first_name
        last_name: $inputs.last_name
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      accountId: $response.body#/id
  - stepId: orderForNewStep
    description: Create an order for the newly created account.
    operationId: createOrder
    requestBody:
      contentType: application/json
      payload:
        account_id: $steps.createAccountStep.outputs.accountId
        items: $inputs.items
        currency: $inputs.currency
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      orderId: $response.body#/id
      orderNumber: $response.body#/number
  outputs:
    orderId: $steps.orderForExistingStep.outputs.orderId
    newAccountOrderId: $steps.orderForNewStep.outputs.orderId