arazzo: 1.0.1
info:
  title: SAP BRIM Update a Subscription Item Quantity and Re-invoice
  summary: List a subscription's items, update the quantity of one, confirm it, and generate an invoice.
  description: >-
    Adjusts a subscription line item and rebills on SAP BRIM Subscription
    Billing. The workflow lists the items on a subscription to pick the target
    item, updates that item's quantity, reads the item back to confirm the new
    quantity, and generates an on-demand invoice reflecting the change. Every
    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: subscriptionBillingApi
  url: ../openapi/sap-brim-subscription-billing-openapi.yml
  type: openapi
workflows:
- workflowId: update-item-quantity-and-invoice
  summary: Update a subscription item's quantity and generate an invoice for it.
  description: >-
    Lists subscription items, updates the supplied item's quantity, confirms the
    new quantity, and generates an on-demand invoice for the subscription.
  inputs:
    type: object
    required:
    - subscriptionId
    - itemId
    - quantity
    properties:
      subscriptionId:
        type: string
        description: Identifier of the subscription containing the item.
      itemId:
        type: string
        description: Identifier of the item to update.
      quantity:
        type: integer
        description: New quantity for the item.
  steps:
  - stepId: listItems
    description: List the subscription items to confirm the target item exists.
    operationId: listSubscriptionItems
    parameters:
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      items: $response.body#/results
  - stepId: updateItem
    description: Update the quantity of the target subscription item.
    operationId: updateSubscriptionItem
    parameters:
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    - name: itemId
      in: path
      value: $inputs.itemId
    requestBody:
      contentType: application/json
      payload:
        quantity: $inputs.quantity
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      itemId: $response.body#/itemId
      quantity: $response.body#/quantity
  - stepId: confirmItem
    description: Read the item back to confirm the updated quantity and total price.
    operationId: getSubscriptionItem
    parameters:
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    - name: itemId
      in: path
      value: $inputs.itemId
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.quantity == $inputs.quantity
      type: jsonpath
    outputs:
      quantity: $response.body#/quantity
      totalPrice: $response.body#/totalPrice
  - stepId: generateInvoice
    description: Generate an on-demand invoice reflecting the updated item quantity.
    operationId: generateInvoice
    parameters:
    - name: subscriptionId
      in: path
      value: $inputs.subscriptionId
    requestBody:
      contentType: application/json
      payload:
        includeUsageCharges: true
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      billingRecordId: $response.body#/billingRecordId
      invoiceNumber: $response.body#/invoiceNumber
      total: $response.body#/total
  outputs:
    itemId: $steps.updateItem.outputs.itemId
    updatedQuantity: $steps.confirmItem.outputs.quantity
    billingRecordId: $steps.generateInvoice.outputs.billingRecordId
    invoiceNumber: $steps.generateInvoice.outputs.invoiceNumber