@surface/core/internal/metadata/hookable-metadata.js

Provides core functionality of many @surfaces modules.

const HOOKABLE_METADATA = Symbol("core:hookable-metadata");
export default class HookableMetadata {
    finishers = [];
    initializers = [];
    hooked = false;
    static from(target) {
        if (!Reflect.has(target, HOOKABLE_METADATA)) {
            Reflect.defineProperty(target, HOOKABLE_METADATA, { configurable: false, enumerable: false, value: new HookableMetadata() });
        }
        else if (!target.hasOwnProperty(HOOKABLE_METADATA)) {
            Reflect.defineProperty(target, HOOKABLE_METADATA, { configurable: false, enumerable: false, value: Reflect.get(target, HOOKABLE_METADATA).clone() });
        }
        return Reflect.get(target, HOOKABLE_METADATA);
    }
    clone() {
        const metadata = new HookableMetadata();
        metadata.finishers.push(...this.finishers);
        metadata.initializers.push(...this.initializers);
        return metadata;
    }
    finish(instance) {
        this.finishers.forEach(finisher => finisher(instance));
    }
    initialize(instance) {
        this.initializers.forEach(initializer => initializer(instance));
    }
}