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

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

import { toNodeId } from '../common';
import { TreeQuery } from '../TreeQuery';
export function create(tree) {
    const get = (tree, parts) => {
        if (parts.length === 0) {
            return undefined;
        }
        const child = tree.children.find((child) => child.id === parts[0]);
        if (child && parts.length > 1) {
            return get(child, parts.slice(1));
        }
        return child && parts.length > 1
            ? get(child, parts.slice(1))
            : child;
    };
    return {
        from(child) {
            const target = toNodeId(child);
            if (target === tree.id) {
                return tree.id;
            }
            const parts = [];
            const match = tree.find((e) => e.id === target);
            if (match) {
                const query = TreeQuery.create({ root: tree.root });
                query.walkUp(match.id, (e) => {
                    parts.unshift(e.id);
                    if (e.id === tree.id) {
                        e.stop();
                    }
                });
            }
            return parts.join('/');
        },
        get(path) {
            const parts = path.split('/').map((part) => part.trim());
            return parts.length === 1 && parts[0] === tree.id ? tree : get(tree, parts.slice(1));
        },
    };
}