Way to check programatically if a library supports receiving push

[tcard]

Right now, in iOS and Java, the library will compile differently in each case, so it's a compile time error to use the push-receiving methods if on OS X or non-Android Java. But we could have a method/constant/something to determine it programatically at runtime, specially given we're adding push-receiving support for browsers (JS).

My proposal would be rest.push.canActivate() -> Bool. If it returns true, then the rest.push.activate method exists.

Alternative names: canReceive, canRegister. The former might be misleading since maybe it can't receive for case-specific reasons even if the platform is able to (e. g. the user didn't give permission); the latter is more precise but it lacks consistency with the activate method.

┆Issue is synchronized with this Jira Task by Unito

[paddybyers]

Why not have an API that can be queried even on library versions that predate the feature being defined?

eg Ably.hasFeature('push.activate')

[sync-by-unito]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-2817