@vizydrop/logger/lib/productionLogFormat.js

Vizydrop predefined logger based on winston v3

/*********************************************************************
 * © Copyright IBM Corp. 2026
 *********************************************************************/
const {MESSAGE} = require(`triple-beam`);
const jsonStringify = require(`fast-safe-stringify`);

const mapConfig = {
    message: `@message`,
    timestamp: `@timestamp`,
    "trace.id": `trace.id`,
    "transaction.id": `transaction.id`,
    "span.id": `span.id`,
};

const mapConfigEntries = Object.entries(mapConfig);

/*
 * function logstash (info)
 * Returns a new instance of the LogStash Format that turns a
 * log `info` object into pure JSON with the appropriate logstash
 * options. This was previously exposed as { logstash: true }
 * to transports in `winston < 3.0.0`.
 */
module.exports = {
    productionLogFormat: (info) => {
        const formatted = {};
        mapConfigEntries.forEach(([key, newKey]) => {
            if (info[key]) {
                formatted[newKey] = info[key];
                // eslint-disable-next-line no-param-reassign
                delete info[key];
            }
        });

        formatted[`@fields`] = info;
        // eslint-disable-next-line no-param-reassign
        info[MESSAGE] = jsonStringify(formatted);
        return info;
    },
};