Slack Post a Message and Update It Later

arazzo: 1.0.1
info:
  title: Slack Post a Message and Update It Later
  summary: Post an initial status message and then edit it in place with an update.
  description: >-
    A live status pattern that posts a placeholder and edits it in place as
    things change. The workflow posts an initial status message, captures its
    timestamp, and then updates the same message with revised text so the
    channel shows a single evolving status rather than a stream of duplicates.
    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: chatApi
  url: ../openapi/slack-chat-api-openapi.yml
  type: openapi
workflows:
- workflowId: post-update-message
  summary: Post an initial message and then update it in place.
  description: >-
    Posts an initial status message and then edits that same message in place
    with revised text.
  inputs:
    type: object
    required:
    - channel
    - initialText
    - updatedText
    properties:
      channel:
        type: string
        description: The channel ID to post and then update the message in.
      initialText:
        type: string
        description: The initial status message text.
      updatedText:
        type: string
        description: The revised text to replace the initial message with.
  steps:
  - stepId: postInitial
    description: >-
      Post the initial status message and capture its channel and timestamp.
    operationId: postChatPostmessage
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        channel: $inputs.channel
        text: $inputs.initialText
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.ok == true
      type: jsonpath
    outputs:
      channelId: $response.body#/channel
      messageTs: $response.body#/ts
  - stepId: updateMessage
    description: >-
      Update the same message in place with the revised text.
    operationId: postChatUpdate
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        channel: $steps.postInitial.outputs.channelId
        ts: $steps.postInitial.outputs.messageTs
        text: $inputs.updatedText
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.ok == true
      type: jsonpath
    outputs:
      updatedTs: $response.body#/ts
  outputs:
    channelId: $steps.postInitial.outputs.channelId
    messageTs: $steps.postInitial.outputs.messageTs
    updatedTs: $steps.updateMessage.outputs.updatedTs