Trigger The Arqivist using an emoji reaction, in addition to shortcut/slash commands

[jcpsantiago]

Someone reached out via email asking if The Arqivist could support "emoji reactions" as a trigger e.g. adding a specific emoji (maybe even our own little scribe?) would activate the bot and show a private message/modal to the user to then select what to do.

The official documentation is in https://api.slack.com/events/reaction_added TL;DR: we need to listen to the reaction_added event, and then look for a specific emoji.

Pros:

• Nicer UX than the dropdown menu for saving threads (fewer clicks, easier to find)
• Visual feedback when a message thread was archived in Confluence

Cons:

• Depending on the Slack workspace, this could create a lot of "useless" traffic to the server meaning a larger instance?
• Users have to remember which emoji to use (same thing can be said of "where to find the dropdown" though)