X Unfollow a User by Their Username

arazzo: 1.0.1
info:
  title: X Unfollow a User by Their Username
  summary: Resolve a target handle to an id, then unfollow that user.
  description: >-
    Lets the authenticated user unfollow another account given only that
    account's public @username. The workflow resolves the username into a
    numeric user id and then issues the unfollow request, supplying both the
    source and target ids as path parameters so the chain reads and executes
    without opening the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: xApi
  url: ../openapi/x-api-openapi.json
  type: openapi
workflows:
- workflowId: unfollow-user-by-username
  summary: Resolve a username and unfollow that user as the authenticated account.
  description: >-
    Chains the username lookup endpoint into the unfollow-user endpoint, using
    the resolved id as the unfollow target.
  inputs:
    type: object
    required:
    - authUserId
    - targetUsername
    properties:
      authUserId:
        type: string
        description: The numeric id of the authenticated user who will unfollow.
      targetUsername:
        type: string
        description: The @username of the account to unfollow, without the leading @.
      authorization:
        type: string
        description: OAuth2 user token to authorize the requests (e.g. "Bearer xxx").
  steps:
  - stepId: resolveTarget
    description: Resolve the target username into a numeric user id.
    operationId: getUsersByUsername
    parameters:
    - name: username
      in: path
      value: $inputs.targetUsername
    - name: user.fields
      in: query
      value: id,name,username
    - name: Authorization
      in: header
      value: $inputs.authorization
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      targetUserId: $response.body#/data/id
  - stepId: unfollowTarget
    description: Unfollow the resolved target user as the authenticated user.
    operationId: unfollowUser
    parameters:
    - name: source_user_id
      in: path
      value: $inputs.authUserId
    - name: target_user_id
      in: path
      value: $steps.resolveTarget.outputs.targetUserId
    - name: Authorization
      in: header
      value: $inputs.authorization
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      following: $response.body#/data/following
  outputs:
    targetUserId: $steps.resolveTarget.outputs.targetUserId
    following: $steps.unfollowTarget.outputs.following