BlockBBEvent in scripts?

[commandblock2]

@idk-my-name
Indeed there is no onBlockBB provided.
Before this someone showed me the matrix fly (rewinside + jump, patched) made by aftery in scriptapi(obf), it would be almost impossible to implement without blockBB. I didn't figure out back then
It took me a long time to finally figured out a way to subscribe to arbitrary event in scriptAPI with reflection and Java.extend.
Hint:

Java.extend(Listenable, Consumer, {
    handleEvents: function() { return true},
    accept: function(e) {

    }
})

and this.

[idk my name]

@commandblock2
I understood from your tutorial that I should somewhere use registerListener, prob like this:

onEnable: function() {
    LiquidBounce.INSTANCE.eventManager.registerListener(listener)
},
onDisable: function() {
    LiquidBounce.INSTANCE.eventManager.unregisterListener(listener)
}
listener = Java.extend(Listenable, Consumer, { 
    handleEvents: function() { return true}, 
    accept: function(e) { 
        e instanceof BlockBBEvent && print("Hello from BlockBBEvent!")
    } 
})

[CzechHek]

@commandblock2 waait that's cool never had that idea

I might automatize that via Core.

[idk my name]

@czechhek Marco says: the problem will be in optimization

[mems]

He basically says that the event is not added due to its performance killing capability as it is called lots of times in the code.

[CzechHek]

@idk-my-name you should probably register it on load, unregister it on unload and handle if it gets triggered in handleEvents method

[commandblock2]

@idk-my-name
Indeed something like that.

val eventClass = method.parameterTypes[0] as Class<out Event>
val eventTarget = method.getAnnotation(EventTarget::class.java)

Unfortunately, nashorn/reflection does not have any capability of adding annotations.
method.getAnnotation(EventTarget::class.java)
and we will have to make our own registerListener().

The 3 lines actually does the work is here.

val invokableEventTargets = registry.getOrDefault(eventClass, ArrayList())
invokableEventTargets.add(EventHook(listener, method, eventTarget))
registry[eventClass] = invokableEventTargets

You only need to convert this 3 line to js and it would be fine.
Note the second line
EventHook(listener, method, eventTarget)
the listener is just the listener,
the method is accept acquired using reflection
but for the eventTarget, I borrowed it with reflection from a function in other class that extends Listener already presented in LB.

As for the performance issue, it's true, in my case, putting a print every time it is called makes the frame rate goes from 80(limited) to less than 1.

[idk my name]

@commandblock2 I currently did this:

///api_version=2
(script = registerScript({
    name: "BlockBBEvent",
    authors: ["xWhitey"],
    version: "1.337"
})).import("Core.lib");

module = {
    category: "Core",
    onLoad: function() {
        registerListener(Java.extend((Java.type('net.ccbluex.liquidbounce.event.Listenable')), (Java.type('java.util.function.Consumer')), {
            handleEvents: function() { return true },
            accept: function(e) {
                e instanceof BlockBBEvent && print("Hello from BlockBBEvent!")
            }
        }))
    }
}

function registerListener(listener) {
    for each(method in listener.class.getDeclaredMethods()) {
        if (method.getParameterTypes().length == 1) {
            if (!method.isAccessible())
                method.setAccessible(true);
			
            var eventClass = method.getParameterTypes()[0];

            var adaptedEventManager = new Reflector(LiquidBounce.INSTANCE.eventManager);

            var invokableEventTargets = adaptedEventManager.registry.getOrDefault(eventClass, new ArrayList());
            var onTickMethod = (Java.type('net.ccbluex.liquidbounce.utils.RotationUtils')).class.getDeclaredMethod("onTick", TickEvent.class);
            var annotations = onTickMethod.getDeclaredAnnotations();
            var annotation = null;
            for each(a in annotations) {
                annotation = a;
            }
            invokableEventTargets.add(new EventHook(listener, method, annotation));
            adaptedEventManager.registry.put(eventClass, invokableEventTargets);
        }
    }
}

var TickEvent = Java.type('net.ccbluex.liquidbounce.event.TickEvent'), BlockBBEvent = Java.type('net.ccbluex.liquidbounce.event.BlockBBEvent'), EventHook = Java.type('net.ccbluex.liquidbounce.event.EventHook'), ArrayList = Java.type('java.util.ArrayList');

but it throws an error:

[23:01:10] [Client thread/ERROR] [LiquidBounce]: [ScriptAPI] Exception in script 'BlockBBEvent'!
java.lang.ClassCastException: Cannot cast jdk.internal.dynalink.beans.StaticClass to net.ccbluex.liquidbounce.event.Listenable
	at java.lang.invoke.MethodHandleImpl.newClassCastException(Unknown Source) ~[?:1.8.0_144]
	at java.lang.invoke.MethodHandleImpl.castReference(Unknown Source) ~[?:1.8.0_144]
	at jdk.nashorn.internal.scripts.Script$Recompilation$6736$598A$\^eval\_.registerListener(<eval>:37) ~[?:?]
	at jdk.nashorn.internal.scripts.Script$Recompilation$6733$207$\^eval\_.onLoad(<eval>:11) ~[?:?]
	at jdk.nashorn.internal.scripts.Script$Recompilation$6546$\^eval\_.L:611#L:629(<eval>:631) ~[?:?]
	at jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:628) ~[ScriptFunctionData.class:?]
	at jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:494) ~[ScriptFunction.class:?]
	at jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:393) ~[ScriptRuntime.class:?]
	at jdk.nashorn.api.scripting.ScriptObjectMirror.call(ScriptObjectMirror.java:117) ~[ScriptObjectMirror.class:?]
	at net.ccbluex.liquidbounce.script.Script.callEvent(Script.kt:203) [Script.class:?]
	at net.ccbluex.liquidbounce.script.Script.onEnable(Script.kt:171) [Script.class:?]
	at net.ccbluex.liquidbounce.script.ScriptManager.enableScripts(ScriptManager.kt:53) [ScriptManager.class:?]
	at net.ccbluex.liquidbounce.LiquidBounce.startClient(LiquidBounce.kt:130) [LiquidBounce.class:?]
	at net.minecraft.client.Minecraft.handler$zze000$startGame(Minecraft.java:3428) [bib.class:?]
	at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:536) [bib.class:?]
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378) [bib.class:?]
	at net.minecraft.client.main.Main.main(SourceFile:123) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_144]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_144]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_144]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_144]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [game.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [game.jar:?]

[A Former User]

@idk-my-name said in BlockBBEvent in scripts?:

authors: ["xWhitey"],

[idk my name]

@fartcheese and? who asked?

[A Former User]

@idk-my-name who did

[idk my name]

@fartcheese wdym

[A Former User]

@idk-my-name WHO asked

the guy named WHO asked

[idk my name]

@fartcheese lmao

[A Former User]

@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")

[idk my name]

@czechhek my problem was too stupid: i forgot to create new instance of my listener (and i had some shitcode in listener prob)

[A Former User]

@idk-my-name you forgor