Adobe Combine Two PDFs Into One

arazzo: 1.0.1
info:
  title: Adobe Combine Two PDFs Into One
  summary: Upload two PDFs, combine them into a single document, poll the job, and fetch the merged result.
  description: >-
    Drives the Adobe PDF Services asynchronous combine pipeline that merges
    multiple PDFs into one. The workflow registers two source PDFs by
    requesting a pre-signed upload URI and asset ID for each, submits a
    combinePDF job referencing both assets in order, polls the job until it
    reports done, and resolves a download URI for the merged output. Each step
    spells out its request inline. The polling job identifier is supplied as a
    workflow input because the submit response exposes only an opaque Location
    header.
  version: 1.0.0
sourceDescriptions:
- name: pdfServicesApi
  url: ../openapi/adobe-pdf-services-api-openapi.yml
  type: openapi
workflows:
- workflowId: combine-pdfs
  summary: Merge two uploaded PDFs into a single PDF, in order.
  description: >-
    Requests an upload slot for each of two source PDFs, submits a combinePDF
    job that merges them in order, polls job status until combination finishes,
    and retrieves the download URI for the merged PDF.
  inputs:
    type: object
    required:
    - accessToken
    - jobID
    properties:
      accessToken:
        type: string
        description: OAuth 2.0 bearer access token from Adobe IMS.
      jobID:
        type: string
        description: The job identifier taken from the combinePDF response Location header, used to poll status.
  steps:
  - stepId: uploadFirst
    description: >-
      Request a pre-signed upload URI and asset ID for the first source PDF,
      which is then PUT to the returned uploadUri out of band.
    operationId: uploadAsset
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.accessToken"
    requestBody:
      contentType: application/json
      payload:
        mediaType: application/pdf
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      assetID: $response.body#/assetID
      uploadUri: $response.body#/uploadUri
  - stepId: uploadSecond
    description: >-
      Request a pre-signed upload URI and asset ID for the second source PDF,
      which is then PUT to the returned uploadUri out of band.
    operationId: uploadAsset
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.accessToken"
    requestBody:
      contentType: application/json
      payload:
        mediaType: application/pdf
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      assetID: $response.body#/assetID
      uploadUri: $response.body#/uploadUri
  - stepId: submitCombine
    description: >-
      Submit an asynchronous combinePDF job that merges the two uploaded PDFs
      in order. Returns 201 with an in-progress job status.
    operationId: combinePDF
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.accessToken"
    requestBody:
      contentType: application/json
      payload:
        assets:
        - assetID: $steps.uploadFirst.outputs.assetID
        - assetID: $steps.uploadSecond.outputs.assetID
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      status: $response.body#/status
  - stepId: pollStatus
    description: >-
      Poll the combinePDF job until it is no longer in progress, looping back
      while the status remains "in progress".
    operationId: getJobStatus
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.accessToken"
    - name: operationType
      in: path
      value: combinepdf
    - name: jobID
      in: path
      value: $inputs.jobID
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/status
      outputAssetID: $response.body#/asset/assetID
    onSuccess:
    - name: stillRunning
      type: goto
      stepId: pollStatus
      criteria:
      - context: $response.body
        condition: $.status == "in progress"
        type: jsonpath
    - name: finished
      type: goto
      stepId: getOutput
      criteria:
      - context: $response.body
        condition: $.status == "done"
        type: jsonpath
  - stepId: getOutput
    description: >-
      Resolve a pre-signed download URI for the merged output PDF.
    operationId: getAsset
    parameters:
    - name: Authorization
      in: header
      value: "Bearer $inputs.accessToken"
    - name: assetID
      in: path
      value: $steps.pollStatus.outputs.outputAssetID
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      downloadUri: $response.body#/downloadUri
  outputs:
    firstAssetID: $steps.uploadFirst.outputs.assetID
    secondAssetID: $steps.uploadSecond.outputs.assetID
    outputAssetID: $steps.pollStatus.outputs.outputAssetID
    downloadUri: $steps.getOutput.outputs.downloadUri