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Enter/leave messages don't have timestamps #575

sinisterstuf opened this issue Aug 22, 2019 · 1 comment


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commented Aug 22, 2019


Marking this as question because I'm not sure it's a bug. I've noticed that the enter and leave events are missing a timestamp (I will talk about only enter events from here on because leave events behave the same).

Most things in the eventHandler return a timestamp from event.ts or event.event_ts. Enter events do not: (source)

    else if event.type is "member_joined_channel"
      # this event type always has a channel = channel
      @robot.logger.debug "Received enter message for user: #{}, joining: #{channel}"
      @receive new EnterMessage user

The only thing it passes to @receive is user, and you can see as much if you console.log what you get when using robot.enter as a script developer; you have user data and that's it.

My use case is: I'd like the robot to apply emoji reactions to the message for the enter event in Slack but that action requires a timestamp and a channel. I can get the channel from room, kinda, but I don't have the message timestamp.

To be honest it's not clear to me whether that RTM event even contains a timestamp or not because the documentation for member_joined_channel does not include a timestamp in the example even though the example in the 2017 blog post introducing this event does include one. What's for sure is that the message/channel_join did include a timestamp and probably its frequency would be sufficient for my use case but we moved away from using that in #513.

If the RTM event member_joined_channel does include a timestamp, this is perfect and I will create a pull request to try to propogate that timestamp to Hubot. How can I find that out?

If it does not have one, then it is probably intentional and in that case, how can I work around the now-missing message/channel_join which has the timestamp I need?

Sorry for the wall of text 😅

What type of issue is this?

  • question


  • 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.

@sinisterstuf sinisterstuf changed the title Enter/join don't have timestamps Enter/leave messages don't have timestamps Aug 22, 2019


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commented Aug 22, 2019

OK after a bit of experimentation and a message back and forth with Slack support I can confirm that member_joined_channel and member_left_channel both have timestamps, so I'm going to give a go at a pull request for this later.

Two impediments I can foresee:

  1. I'll need some guidance on appropriate unit tests for this
  2. I have no idea how I could actually reproduce this and prove that it works except for trying it out in production, how is this usually done?
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