Dolby OptiView Attach Ingest and Engine then Go Live

arazzo: 1.0.1
info:
  title: Dolby OptiView Attach Ingest and Engine then Go Live
  summary: Add an ingest and a transcoding engine to a channel, start it, and poll until playing.
  description: >-
    Builds out a THEOlive channel's transcode pipeline end to end. The workflow
    creates an ingest (the source feed), provisions a transcoding engine bound
    to that ingest with a chosen ABR ladder, starts the channel, then poll-loops
    the channel until its documented status reaches playing or error. Engine
    deployment and start-up are asynchronous, so the poll loop mirrors the async
    media-job pattern. Every step inlines its Authorization header and request
    body so the flow can be read and executed without opening the underlying
    OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: channelsApi
  url: ../openapi/dolby-io-channels-api-openapi.yml
  type: openapi
workflows:
- workflowId: attach-ingest-engine-and-go-live
  summary: Create an ingest and engine on a channel, start it, and wait for playing.
  description: >-
    Attaches a source ingest and a transcoding engine to an existing channel,
    starts the channel, and waits until the channel status settles on playing
    or error.
  inputs:
    type: object
    required:
    - authorization
    - channelId
    - ingestName
    - ingestType
    - engineName
    - region
    - abrLadderId
    properties:
      authorization:
        type: string
        description: HTTP Basic Authorization header value.
      channelId:
        type: string
        description: The id of the channel to attach the ingest and engine to.
      ingestName:
        type: string
        description: Name of the ingest to create.
      ingestType:
        type: string
        description: Ingest type (rtmp-push, rtmp-pull, srt-pull, srt-push, or sdi-pull).
      ingestUrl:
        type: string
        description: Source URL (required for pull ingest types).
      region:
        type: string
        description: Region id to deploy the engine in (and required for rtmp-push ingests).
      engineName:
        type: string
        description: Name of the transcoding engine to create.
      abrLadderId:
        type: string
        description: ABR ladder id used for the engine quality configuration.
  steps:
  - stepId: createIngest
    description: >-
      Create the ingest (source feed) on the channel. Returns the ingest id and
      stream key under data.
    operationId: create-channel-ingest
    parameters:
    - name: id
      in: path
      value: $inputs.channelId
    - name: Authorization
      in: header
      value: $inputs.authorization
    requestBody:
      contentType: application/json
      payload:
        name: $inputs.ingestName
        type: $inputs.ingestType
        url: $inputs.ingestUrl
        region: $inputs.region
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      ingestId: $response.body#/data/id
      streamKey: $response.body#/data/streamKey
  - stepId: createEngine
    description: >-
      Provision a transcoding engine bound to the new ingest, deployed in the
      requested region with the chosen ABR ladder.
    operationId: create-channel-engine
    parameters:
    - name: id
      in: path
      value: $inputs.channelId
    - name: Authorization
      in: header
      value: $inputs.authorization
    requestBody:
      contentType: application/json
      payload:
        ingestId: $steps.createIngest.outputs.ingestId
        name: $inputs.engineName
        region: $inputs.region
        quality:
          abrLadderId: $inputs.abrLadderId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      engineId: $response.body#/data/id
      engineStatus: $response.body#/data/status
  - stepId: startChannel
    description: Start the channel, which boots the newly attached engine.
    operationId: start-channel
    parameters:
    - name: id
      in: path
      value: $inputs.channelId
    - name: Authorization
      in: header
      value: $inputs.authorization
    successCriteria:
    - condition: $statusCode == 204
  - stepId: pollChannelStatus
    description: >-
      Poll the channel until its status reaches playing (live) or error. Status
      transitions through deploying, starting, waiting and ingesting while the
      engine spins up.
    operationId: get-channel
    parameters:
    - name: id
      in: path
      value: $inputs.channelId
    - name: Authorization
      in: header
      value: $inputs.authorization
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      status: $response.body#/data/status
    onSuccess:
    - name: live
      type: end
      criteria:
      - context: $response.body
        condition: $.data.status == "playing"
        type: jsonpath
    - name: failed
      type: end
      criteria:
      - context: $response.body
        condition: $.data.status == "error"
        type: jsonpath
    - name: keepPolling
      type: goto
      stepId: pollChannelStatus
      criteria:
      - context: $response.body
        condition: $.data.status != "playing" && $.data.status != "error"
        type: jsonpath
  outputs:
    ingestId: $steps.createIngest.outputs.ingestId
    engineId: $steps.createEngine.outputs.engineId
    finalStatus: $steps.pollChannelStatus.outputs.status