Scheduled messages as action triggers

[jimenezj8]

Because there's no way (that I know of) to schedule actions within my application, I'm going to use scheduled messages within the workspace to do so. Specifically, this is going to consist of:

• [x] Modifying calls to chat.scheduleMessage to have:
  • [x] channel=BOT_MEMBER_ID, which will post messages from the bot to the bot, effectively creating hidden messages within the Slack workspace since only the bot user can read it's own messages
  • [x] Additional payload value:
  • channel=[actual destination of message]
• [x] For each event type that would benefit from an intermediate handler, create one as a nested function within the event handler for message_metadata_posted
  • [x] Each intermediate handler is anticipated to take at least the following inputs:
  • Originally scheduled message text
  • Originally scheduled message metadata (after replacing event_type with next_event_type and pop-ing the channel)
  • Message destination channel
  • client: WebClient
  • logger: logging.Logger

[jimenezj8]

This is relevant especially to implementing #10