Add support to update messages

[AngellusMortis]

Description

Describe your issue here.

What type of issue is this? (place an x in one of the [ ])

• bug
• enhancement (feature request)
• question
• documentation related
• example code related
• testing related
• discussion

Requirements (place an x in each of the [ ])

• I've read and understood the Contributing guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've searched for any related issues and avoided creating a duplicate issue.

---

It would be great to add support for the chat.update endpoint. Idea came from trying to make better GHA deploy messages.

Something like:

- id: slack
  uses: slackapi/slack-github-action@v1.18.0
  with:
    channel-id: "#channel"
    payload: |
      {
        "attachments": [
          {
            "pretext": "Deployment started",
            "color": "dbab09",
            "fields": [
              {
                "title": "Status",
                "short": true,
                "value": "In Progress"
              }
            ]
          }
        ]
      }
  env:
    SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN}}
- uses: slackapi/slack-github-action@v1.18.0
  with:
    channel-id: "#channel"
    time: ${{ steps.slack.outputs.time }}
    payload: |
      {
        "attachments": [
          {
            "pretext": "Deployment finished",
            "color": "28a745",
            "fields": [
              {
                "title": "Status",
                "short": true,
                "value": "Completed"
              }
            ]
          }
        ]
      }
  env:
    SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN}}

[stevengill]

@AngellusMortis we just added support for threading in follow up steps with version v1.19.0. Would that be sufficient for you vs chat.update? See https://github.com/slackapi/slack-github-action/blob/main/.github/workflows/main.yml#L35-L46

[AngellusMortis]

Not really. Posting in a thread kind of works, but if you have seen how the Github notifications works (updates the OP in real time as things change), they really are superior.

We are just using raw curl requests right now, so we have a viable workaround.

[NicolasTobias]

Me neither, would be nice to have that specifically option

[magnattic]

I just found this update option in the README and was trying it out, but it doesn't work for me:

Warning: Unexpected input(s) 'update-ts', valid inputs are ['channel-id', 'slack-message', 'payload', 'payload-file-path']
Run slackapi/slack-github-action@v1.20.0
  with:
    channel-id: U02D1JY1Y1Z
    update-ts: 165896170.317839
    slack-message: Hey magnattic, your PR for branch `XYZ` was just merged to master! 🎉🎉🎉

Error: Error: An API error occurred: message_not_found

Any idea what I might be doing wrong? I pretty much followed the example. The channel id is my user id in slack.

            - name: Send slack start message
              id: slack
              if: env.slackUserId != ''
              uses: slackapi/slack-github-action@v1.20.0
              with:
                  channel-id: ${{env.slackUserId}}
                  slack-message: |
                      Hey ${{ github.actor }}, your PR for branch `${{github.head_ref}}` is now being checked!
              env:
                  SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
[...]
            - name: Send slack success message
              if: env.slackUserId != ''
              uses: slackapi/slack-github-action@v1.20.0
              with:
                  channel-id: ${{env.slackUserId}}
                  update-ts: ${{ steps.slack.outputs.ts }}
                  slack-message: |
                      Hey ${{ github.actor }}, your PR for branch `${{github.head_ref}}` was just merged to master! 🎉🎉🎉
              env:
                  SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}

[stevengill]

@magnattic just pushed up v1.21.0 to fix this. Let me know if it works

[magnattic]

@stevengill Thanks for the quick response!
Unfortunately, I still get this error:

Error: Error: An API error occurred: message_not_found

Does updating maybe not work in slack when sending messages directly to a user?

EDIT: Just tried to send the messages to a channel instead, there it works flawlessly. It seems to be a problem when sending messages directly to a userId

[seratch]

@magnattic Yeah, you can use user_id for chat.postMessage but unfortunately user_id is not supported in chat.update (sorry for the confusing difference here!).

[seratch]

Now that the message updating feature is available, let me close this issue. Thanks again @kuboon for your great contribution!

[magnattic]

I see, would be cool to mention in the docs. Anyway, great job adding this!