import ledger from '@concords/ledger';

const {
  auth,
  load,
  create,
  replay,
  commit,
  add,
} = ledger();

create();
auth(identity);

// plugin.js
const useLokiPlugin = (db) => {
  let collection;

  function createCollection({ ledger }) {
    collection = db.addCollection(ledger.id, { disableMeta: true });
  }

  return {
    getCollection: () => collection,
    plugin: {
      onLoad: createCollection,
      onAdd(record) {
        const item = collection.findOne({ id: record.data.id });
        if (item) {
          collection.update({ ...item, ...record.data });
        } else {
          collection.insert(record.data);
        }
      },
    },
  };
};

import loki from 'lokijs';
import useLokiPlugin from './plugin';

const {
  getCollection,
  plugin: lokiPlugin
} = useLokiPlugin(new loki('ledger.db'));

function handleUpdates({ ledger }) {
  const collection = getCollection();

  list = collection.chain()
    .compoundsort([['created_at', false], ['title', true]])
    .data();
}

const { add, commit } = Ledger({
  ...user,
  ledger,
  plugins: [
    lokiPlugin,
    {
      onReady: handleUpdates,
      onUpdate: handleUpdates,
    }
  ]
});

add({
  title: 'Add any JSON data',
  created_at: Date.now(),
  id: 1
});

commit();