arazzo: 1.0.1
info:
  title: Adobe PDF Services Combine PDFs
  summary: Upload two PDFs, combine them into one, poll the job, and get the merged output download URI.
  description: >-
    Combines two source PDFs into a single merged PDF using the Adobe PDF
    Services asynchronous job model. The workflow registers each source PDF by
    requesting an upload asset, submits a combine operation referencing both
    asset ids in order, polls the operation status until it is done or failed,
    and resolves a temporary download URI for the merged output. 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: pdfServicesApi
  url: ../openapi/adobe-creative-suite-pdf-services-openapi.yml
  type: openapi
workflows:
- workflowId: combine-pdfs
  summary: Upload two PDFs, merge them in order, and resolve the merged download URI.
  description: >-
    Registers two source PDF assets, submits a combine operation merging them in
    order, polls the job to a terminal state, and returns the download URI of the
    merged PDF on success.
  inputs:
    type: object
    properties:
      firstMediaType:
        type: string
        description: MIME type of the first source PDF (defaults to application/pdf).
      secondMediaType:
        type: string
        description: MIME type of the second source PDF (defaults to application/pdf).
  steps:
  - stepId: uploadFirst
    description: Request an upload asset for the first source PDF.
    operationId: uploadAsset
    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 an upload asset for the second source PDF.
    operationId: uploadAsset
    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 a combine operation merging the two uploaded PDFs in order. The API
      returns a job id for polling.
    operationId: combinePDFs
    requestBody:
      contentType: application/json
      payload:
        assets:
        - assetID: $steps.uploadFirst.outputs.assetID
        - assetID: $steps.uploadSecond.outputs.assetID
    successCriteria:
    - condition: $statusCode == 201
    outputs:
      jobID: $response.body#/jobID
  - stepId: pollOperation
    description: >-
      Poll the combine operation status, repeating while it is in progress and
      branching once it is done or failed.
    operationId: getOperationStatus
    parameters:
    - name: jobId
      in: path
      value: $steps.submitCombine.outputs.jobID
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/status
      assetID: $response.body#/asset/assetID
    onSuccess:
    - name: operationDone
      type: goto
      stepId: getOutput
      criteria:
      - context: $response.body
        condition: $.status == "done"
        type: jsonpath
    - name: operationFailed
      type: goto
      stepId: reportFailure
      criteria:
      - context: $response.body
        condition: $.status == "failed"
        type: jsonpath
    - name: stillRunning
      type: retry
      stepId: pollOperation
      retryAfter: 5
      retryLimit: 30
      criteria:
      - context: $response.body
        condition: $.status == "in progress"
        type: jsonpath
  - stepId: getOutput
    description: >-
      Retrieve the merged PDF asset metadata and a fresh temporary download URI
      for the output file.
    operationId: getAsset
    parameters:
    - name: assetID
      in: path
      value: $steps.pollOperation.outputs.assetID
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      downloadUri: $response.body#/downloadUri
      size: $response.body#/size
    onSuccess:
    - name: done
      type: end
  - stepId: reportFailure
    description: Surface the error details from the failed combine operation.
    operationId: getOperationStatus
    parameters:
    - name: jobId
      in: path
      value: $steps.submitCombine.outputs.jobID
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      errors: $response.body#/errors
  outputs:
    firstAssetID: $steps.uploadFirst.outputs.assetID
    secondAssetID: $steps.uploadSecond.outputs.assetID
    jobID: $steps.submitCombine.outputs.jobID
    outputDownloadUri: $steps.getOutput.outputs.downloadUri
    errors: $steps.reportFailure.outputs.errors