support "reactions" as a methodology for user interaction

[tkellen]

I'm not wild about how slack specific this is, but i think it would be possible to provide complex user interactions sans typing by using "reactions". Here is a minimal example of an existing app that does this:

[cowboy]

It's possible that, to do this, we'll need to keep track of every message "item" so that we can correlate reactions to items. https://api.slack.com/events/reaction_added

It doesn't look like the app in your example is doing anything with the reactions. Does it yield some kind of report when done?