ultraviolet/client/native/object.js

import EventEmitter from "../events.js";
import HookEvent from "../hook.js";

class ObjectHook extends EventEmitter {
    constructor(ctx) {
        super();
        this.ctx = ctx;
        this.window = ctx.window;
        this.Object = this.window.Object;
        this.getOwnPropertyDescriptors = this.Object.getOwnPropertyDescriptors;
        this.getOwnPropertyDescriptor = this.Object.getOwnPropertyDescriptor;
        this.getOwnPropertyNames = this.Object.getOwnPropertyNames;
    };
    overrideGetPropertyNames() {
        this.ctx.override(this.Object, 'getOwnPropertyNames', (target, that, args) => {
            if (!args.length) return target.apply(that, args);
            let [ object ] = args;

            const event =  new HookEvent({ names: target.call(that, object) }, target, that);
            this.emit('getOwnPropertyNames', event);
 
            if (event.intercepted) return event.returnValue;
            return event.data.names;
        });
    };
    overrideGetOwnPropertyDescriptors() {
        this.ctx.override(this.Object, 'getOwnPropertyDescriptors', (target, that, args) => {
            if (!args.length) return target.apply(that, args);
            let [ object ] = args;

            const event =  new HookEvent({ descriptors: target.call(that, object) }, target, that);
            this.emit('getOwnPropertyDescriptors', event);
 
            if (event.intercepted) return event.returnValue;
            return event.data.descriptors;
        });
    };
};

export default ObjectHook;