@tmlmobilidade/utils/dist/src/singleton-proxy.js

This package provides a collection of common utility functions used across projects within the organization.

/**
 * Creates a proxy for a singleton class that delays method access until the instance is initialized.
 * @param cls - A class with a static `getInstance` method that returns a promise resolving to the class instance.
 * @returns A proxy object that intercepts method calls and ensures the instance is initialized before invoking them.
 */
export function AsyncSingletonProxy(cls) {
    return new Proxy({}, {
        get: function (_target, prop, receiver) {
            return async (...args) => {
                const instance = await cls.getInstance();
                const targetProp = Reflect.get(instance, prop, receiver);
                if (typeof targetProp === 'function') {
                    return targetProp.apply(instance, args);
                }
                return targetProp;
            };
        },
    });
}