arazzo: 1.0.1
info:
  title: Particle Health ADT Event Subscription
  summary: Register a patient, subscribe to encounter (ADT) notifications, trigger a sandbox event, and retrieve the resulting HL7 v2 messages.
  description: >-
    Implements an event-notification flow aligned with the HL7 Da Vinci Alerts /
    Notifications pattern. After registering a patient, the caller subscribes to
    network ADT (admit / discharge / transfer) events, fires a sandbox event to
    exercise the subscription, and then pulls the resulting HL7 v2 messages for
    the patient. This is the basis for care-coordination alerting and event-driven
    follow-up. Each step inlines its request so the flow is self-contained.
  version: 1.0.0
sourceDescriptions:
- name: particleApi
  url: ../openapi/particle-health-openapi.yml
  type: openapi
workflows:
- workflowId: adt-event-subscription
  summary: Subscribe a patient to ADT notifications and retrieve the resulting HL7 v2 messages.
  description: >-
    Registers a patient, creates an ADT subscription, triggers a sandbox event,
    and collects the HL7 v2 messages generated for that patient.
  inputs:
    type: object
    required:
    - clientId
    - clientSecret
    - demographics
    - subscription
    properties:
      clientId:
        type: string
        description: Particle client id used to obtain a bearer token.
      clientSecret:
        type: string
        description: Particle client secret used to obtain a bearer token.
      demographics:
        type: object
        description: Patient demographic packet used to register the patient.
      subscription:
        type: object
        description: Subscription definition selecting the ADT / encounter event types to be notified about.
  steps:
  - stepId: authenticate
    description: Exchange the client credentials for a bearer token used by every subsequent call.
    operationId: getAuthToken
    parameters:
    - name: client_id
      in: header
      value: $inputs.clientId
    - name: client_secret
      in: header
      value: $inputs.clientSecret
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      token: $response.body#/token
  - stepId: registerPatient
    description: Register the patient that the ADT subscription will watch.
    operationId: submitPatient
    requestBody:
      contentType: application/json
      payload: $inputs.demographics
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      patientId: $response.body#/id
  - stepId: createSubscription
    description: Subscribe the patient to ADT / encounter notifications across the networks.
    operationId: createPatientSubscriptions
    parameters:
    - name: particle_patient_id
      in: path
      value: $steps.registerPatient.outputs.patientId
    requestBody:
      contentType: application/json
      payload: $inputs.subscription
    successCriteria:
    - condition: $statusCode == 200
  - stepId: triggerSandboxEvent
    description: Fire a sandbox workflow event so the subscription produces a test notification.
    operationId: triggerSandboxWorkflow
    parameters:
    - name: particle_patient_id
      in: path
      value: $steps.registerPatient.outputs.patientId
    successCriteria:
    - condition: $statusCode == 200
  - stepId: collectHl7v2
    description: Retrieve the HL7 v2 messages generated for the patient by the ADT event.
    operationId: getHl7v2Messages
    parameters:
    - name: particle_patient_id
      in: path
      value: $steps.registerPatient.outputs.patientId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      messages: $response.body
  outputs:
    patientId: $steps.registerPatient.outputs.patientId
    messages: $steps.collectHl7v2.outputs.messages