Medplum Upsert Patient

arazzo: 1.0.1
info:
  title: Medplum Upsert Patient
  summary: Search for a Patient by identifier and update it if found, otherwise create it.
  description: >-
    A common master-patient-index pattern. The workflow searches the Patient
    resource type, inspects the returned FHIR Bundle, and branches: when an entry
    is present it updates the existing Patient by id, and when the Bundle is empty
    it creates a new Patient. Because the Medplum search operation exposes only
    the resourceType path parameter, the flow filters on the returned Bundle
    entries client side rather than via a declared query parameter. Every step
    spells out its FHIR request inline.
  version: 1.0.0
sourceDescriptions:
- name: medplumApi
  url: ../openapi/medplum-openapi-original.yml
  type: openapi
workflows:
- workflowId: upsert-patient
  summary: Upsert a Patient resource keyed on the returned search Bundle.
  description: >-
    Searches the Patient resource type, then either updates the first matched
    Patient or creates a new one when the search Bundle is empty.
  inputs:
    type: object
    required:
    - familyName
    - givenName
    properties:
      familyName:
        type: string
        description: The patient's family (last) name to write.
      givenName:
        type: string
        description: The patient's given (first) name to write.
      birthDate:
        type: string
        description: The patient's date of birth in YYYY-MM-DD form.
  steps:
  - stepId: findPatient
    description: >-
      Search the Patient resource type. Medplum returns a FHIR Bundle whose
      entry array holds any matching Patient resources.
    operationId: search
    parameters:
    - name: resourceType
      in: path
      value: Patient
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      matchedPatientId: $response.body#/entry/0/resource/id
    onSuccess:
    - name: patientExists
      type: goto
      stepId: updateExisting
      criteria:
      - context: $response.body
        condition: $.entry.length > 0
        type: jsonpath
    - name: patientMissing
      type: goto
      stepId: createNew
      criteria:
      - context: $response.body
        condition: $.entry.length == 0
        type: jsonpath
  - stepId: updateExisting
    description: >-
      Replace the matched Patient with the supplied name and birth date. FHIR
      update is a full resource PUT, so the resource id is echoed in the body.
    operationId: updateResource
    parameters:
    - name: resourceType
      in: path
      value: Patient
    - name: id
      in: path
      value: $steps.findPatient.outputs.matchedPatientId
    requestBody:
      contentType: application/fhir+json
      payload:
        resourceType: Patient
        id: $steps.findPatient.outputs.matchedPatientId
        name:
        - family: $inputs.familyName
          given:
          - $inputs.givenName
        birthDate: $inputs.birthDate
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      patientId: $response.body#/id
    onSuccess:
    - name: done
      type: end
  - stepId: createNew
    description: >-
      Create a new Patient resource when the search Bundle returned no matching
      entries.
    operationId: createResource
    parameters:
    - name: resourceType
      in: path
      value: Patient
    requestBody:
      contentType: application/fhir+json
      payload:
        resourceType: Patient
        name:
        - family: $inputs.familyName
          given:
          - $inputs.givenName
        birthDate: $inputs.birthDate
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      patientId: $response.body#/id
  outputs:
    updatedPatientId: $steps.updateExisting.outputs.patientId
    createdPatientId: $steps.createNew.outputs.patientId