Promise for condition

[JernejHabjan]

Example:

I have an example for "CanMoveToTarget" which returns Promise because in the background I'm using easystarjs to find path, which works async.

Error

Uncaught Error: error stepping tree: expected condition function 'CanMoveToTarget' to return a boolean but returned '[object Promise]'

[nikkorn]

@JernejHabjan I'd never considered adding support for async condition functions as I'd always thought of condition checks as being instantaneous (preferably inexpensive) operations while the actions themselves would represent long-running operations.

I guess the options are:

• Add support for condition functions to be promisey.
• Use an async action (FindPathToTarget or something) to find the path and either have it fail/succeed based on the findPath result OR have it always succeed and you set the findPath result on the agent and then have a following condition to evaluate it.

If the latter is not a valid option for you then I'd be happy to consider the former, I haven't had much in the way of feedback for this library and a fresh perspective is always welcome.

[JernejHabjan]

Hey. Yes promisey action would work in my case. It's just maybe something to consider to also support that?

[nikkorn]

I can't think of any downsides to implementing this and it could be useful when we have to rely on inexpensive async operations to get our condition result. I will do this for the next release.

Thanks