hyperdrive: Display entries and prefixes with same path in directory listing

hmm.js

import { join } from 'path';
import Corestore from 'corestore';
import RAM from 'random-access-memory';
import Hyperdrive from 'hyperdrive';

async function iteratorPeek(files, folder, prev) {
    let node = null, nextNode = null;
    /** Two nodes in case a file and a folder have the same name*/
    const ite = files.createRangeIterator({
        gt: folder + prev,
        lt: folder + '0', limit: 2
    });
    try {
        await ite.open();
        node = await ite.next();
        const next = await ite.next();
       if (next?.key.startsWith(node.key)) {
            nextNode = { key: node.key + '/' };
        }
    }
    finally {
        await ite.close();
    }
    return { node, nextNode };
}

function getNodeName(node, folder) {
    const suffix = node.key.slice(folder.length + 1);
    const i = suffix.indexOf('/');
    const name = i === -1 ? suffix : suffix.slice(0, i);
    const isFile = node.key.endsWith(name);
    return { name, dir: !isFile ? name + '/' : null, pathname: join(folder, name, !isFile ? '/' : '') };
}

async function* shallowReadGenerator(files, folder, keys) {
    let prev = '/';
    while (true) {
        const { node, nextNode } = await iteratorPeek(files, folder, prev);

        if (!node) {
            break;
        }

        const { name, dir, pathname } = getNodeName(node, folder);
        prev = '/' + name + '0';
        if (nextNode) {
            yield keys ? node : name;
            yield keys ? { key: join(pathname, '/') } : name + '/';
        }
        else yield keys ? { key: pathname } : dir || name;
    }
}

 const corestore = new Corestore((() => {
        return new RAM();
    }))

const drive = new Hyperdrive(corestore);

await drive.put('/a/e', Buffer.from(''))
await drive.put('/a/e/oom', Buffer.from(''))
await drive.put('/a/b/hmm', Buffer.from('hmmm'))
await drive.put('/a/b', Buffer.from('hmmm'))
await drive.put('/a/hi', Buffer.from('hi'))
for await (const name of shallowReadGenerator(drive.files, '/a')) {
        console.log(name)
    }

logs

b
b/
e
e/
hi