BlockBBEvent in scripts?

idk my name

@fartcheese and? who asked?

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@idk-my-name who did

idk my name

@fartcheese wdym

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@idk-my-name WHO asked

the guy named WHO asked

idk my name

@fartcheese lmao

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@idk-my-name

commandblock2

@idk-my-name
What Java.extend() returns is something that behaves like a type (Forgot what it really is, probably a JSAdaptor or something).
Similar to what you will get from using Java.type().

ArrayList = Java.type("java.util.ArrayList")
arrayList = new ArrayList()

BBConsumer = Java.extend(Listenable, Consumer, {
    handleEvents: function() { return true},
    accept: function(e) {
        // onBlockBB here
        
    }
})

consumer = new BBConsumer()
registerListener(consumer)
// not registerListener(BBConsumer)
/* I am sure there would be a better name for BBConsumer
And if you want to use it like a anonymous class in Java you could just read the BlockAnimations.js or better,  nashorn document
https://github.com/CzechHek/Core/blob/879f36d7e41ccc7868285b0a808866b360f30822/Scripts/BlockAnimations.js#L35
*/

Not sure if the type from Java.extend would have other unexpected methods that only takes 1 parameters, you might want to check if the parameter's super class is Event.

Or you could just explicitly specify the accept method in it.
method = consumer.class.getMethod("accept", java.lang.Object.class)

Edit:
Nvm, I forgot that this was scriptAPI, the Consumer here is a Consumer<?>, not Consumer<BlockBBEvent> which means the accepct() takes an java.lang.Object, and it will register a Listener that listens to any event that is an java.lang.Object, which probably means all events.'

Here is what I did

registry = getField(LiquidBounce.eventManager, "registry").get(LiquidBounce.eventManager)
BBs = registry.getOrDefault(BlockBBEvent.class, new ArrayList())
BBs.add(new EventHook(consumer, 
        consumer.class.getMethod("accept", java.lang.Object.class), 
        LiquidBounce.moduleManager.class
                .getDeclaredMethod("onKey", KeyEvent.class)
                .getAnnotation(EventTarget.class)))
registry[BlockBBEvent.class] = BBs

idk my name

@commandblock2 Thank you

CzechHek

@idk-my-name

This is what I came up with without seeing @commandblock2's solution.
I had to reverse engineer a bunch of stuff and then put all together and it worked.

I was wondering what the hell was annotation in Nashorn and it turns out that

print(annotation.class)

literally returns

I'll try to simplify it and automize it via Core.

///api_version=2
(script = registerScript({
    name: "Test",
    authors: ["CzechHek"],
    version: "1.0"
})).import("Core.lib");

module = {
    onClickGuiLoaded: function () {
        listener = new (Java.extend(Listenable, Consumer, { 
            handleEvents: function() { return TestModule.state }, 
            accept: function(e) { 
                print(e)
            }
        }));

        method = getMethod(listener, "accept");
        annotation = getMethod(TestModule, "onUpdate").getDeclaredAnnotations()[0];
        
        AeventManager = new Reflector(LiquidBounce.eventManager)
        invocableEventTargets = AeventManager.registry.getOrDefault(BlockBBEvent.class, new ArrayList());
        invocableEventTargets.add(new EventHook(listener, method, annotation));
        AeventManager.registry[BlockBBEvent.class] = invocableEventTargets;
    }
}

Listenable = Java.type("net.ccbluex.liquidbounce.event.Listenable");
Consumer = Java.type("java.util.function.Consumer");
BlockBBEvent = Java.type("net.ccbluex.liquidbounce.event.BlockBBEvent");
EventHook = Java.type("net.ccbluex.liquidbounce.event.EventHook");
ArrayList = Java.type("java.util.ArrayList")