Google Cloud Platform Delete Empty Folder

arazzo: 1.0.1
info:
  title: Google Cloud Platform Delete Empty Folder
  summary: Confirm a folder has no child projects, then delete it and poll the operation.
  description: >-
    Safely decommissions a folder. Because a folder must be empty before it can
    be deleted, the workflow first lists the projects directly under the folder,
    branches to end if any projects remain, and only proceeds to delete the
    folder when it is empty, polling the returned long-running Operation until
    done. 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: cloudResourceManagerApi
  url: ../openapi/cloud-resource-manager-openapi.yml
  type: openapi
workflows:
- workflowId: delete-empty-folder
  summary: Delete a folder only if it has no child projects.
  description: >-
    Lists child projects, aborts if any remain, otherwise deletes the folder
    and waits for the operation.
  inputs:
    type: object
    required:
    - folderId
    - folderResource
    properties:
      folderId:
        type: string
        description: The folder resource id to delete (e.g. 500123).
      folderResource:
        type: string
        description: The folder resource name used as the list parent, e.g. folders/500123.
  steps:
  - stepId: listChildProjects
    description: >-
      List the projects directly under the folder to verify it is empty.
    operationId: cloudresourcemanager.projects.list
    parameters:
    - name: parent
      in: query
      value: $inputs.folderResource
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      projects: $response.body#/projects
    onSuccess:
    - name: folderEmpty
      type: goto
      stepId: deleteFolder
      criteria:
      - context: $response.body
        condition: $.projects.length == 0
        type: jsonpath
    - name: folderNotEmpty
      type: end
      criteria:
      - context: $response.body
        condition: $.projects.length > 0
        type: jsonpath
  - stepId: deleteFolder
    description: >-
      Delete the empty folder. Returns a long-running Operation whose name is
      used to poll for completion.
    operationId: cloudresourcemanager.folders.delete
    parameters:
    - name: folderId
      in: path
      value: $inputs.folderId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      operationName: $response.body#/name
  - stepId: pollDelete
    description: >-
      Poll the delete operation by name until the done flag is true.
    operationId: cloudresourcemanager.operations.get
    parameters:
    - name: name
      in: path
      value: $steps.deleteFolder.outputs.operationName
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      done: $response.body#/done
    onSuccess:
    - name: deleteComplete
      type: end
      criteria:
      - context: $response.body
        condition: $.done == true
        type: jsonpath
    - name: deleteRunning
      type: goto
      stepId: pollDelete
      criteria:
      - context: $response.body
        condition: $.done == false
        type: jsonpath
  outputs:
    childProjects: $steps.listChildProjects.outputs.projects
    deleteOperation: $steps.deleteFolder.outputs.operationName