yasumi/examples/basic/data-source.ts

import {dataSources, Resource} from '../../src';
import {DataSource} from '../../src/backend/data-source';
import {BaseDataSource} from '../../src/common/data-source';

export const autoIncrement = async (dataSource: BaseDataSource) => {
	const data = await (dataSource as DataSource).getMultiple() as Record<string, string>[];

	const highestId = data.reduce<number>(
		(highestId, d) => (Number(d.id) > highestId ? Number(d.id) : highestId),
		-Infinity
	);

	if (Number.isFinite(highestId)) {
		return (highestId + 1);
	}

	return 1;
};

export const dataSource = (resource: Resource) => new dataSources.jsonlFile.DataSource(resource, 'examples/basic');