pustovitDmytro / winston-csv-format

import { format } from 'winston';

export default function CSVFormatter(fields, options = {}) {

    const delim = options.delimiter || ';';

    const missed = options.missed || '';

    return format.printf(logObject => {

        const data = fields.map(key => {

            const value = logObject[key];

            return value === undefined ? missed : value;

        });

        return data.join(delim);

    });

}