@platform/state/lib/TreeState/helpers.mjs

A small, simple, strongly typed, [rx/observable] state-machine.

import { TreeIdentity } from '../TreeIdentity';
import { TreeQuery } from '../TreeQuery';
const query = TreeQuery.create;
const id = TreeIdentity;
export const helpers = {
    id,
    isInstance(input) {
        return input === null || typeof input !== 'object' ? false : input._kind === 'TreeState';
    },
    props(of, fn) {
        of.props = of.props || {};
        if (typeof fn === 'function') {
            fn(of.props);
        }
        return of.props;
    },
    children(of, fn) {
        const children = (of.children = of.children || []);
        if (typeof fn === 'function') {
            fn(children);
        }
        return of.children;
    },
    ensureNamespace(root, namespace) {
        query(root).walkDown((e) => {
            if (!id.hasNamespace(e.node.id)) {
                e.node.id = id.format(namespace, e.node.id);
            }
            else {
                const res = id.parse(e.node.id);
                if (res.namespace !== namespace) {
                    e.skip();
                }
            }
        });
    },
};