Huh, yeah, this has me a bit stumped too. It's expecting an event "message" to be fired with variable "n", where n is an object with the data, but I'm not sure what n is generated by. I'm not seeing it in the code anywhere.
I think it's something like this:
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But I'm not really sure where to send the event. I tried doing it on .COM, and it returns "true", but nothing happens in-game. This used to be way easier, it was just ExternalInterface.call('openRoom', id) iirc.
edit: I just realized, this is probably some kind of Angular magic, right? I haven't messed with Angular much but if it has some sort of standard for firing events like this, give it a shot.