62 lines
1.7 KiB
TypeScript
62 lines
1.7 KiB
TypeScript
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'use strict'
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/** @module log */
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/** Wrapper for winston that tags streams and optionally writes files with a simple interface. */
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/** Module now also supports optional papertrail integration, other services to follow */
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import { format, transports, createLogger } from 'winston';
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const { SPLAT } = require('triple-beam');
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const { isObject } = require('lodash');
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const APP_NAME : string = process.env.APP_NAME || 'default';
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function formatObject (param : any) {
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if (isObject(param)) {
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return JSON.stringify(param);
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}
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return param;
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}
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const all = format((info : any) => {
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const splat = info[SPLAT] || [];
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const message = formatObject(info.message);
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const rest = splat.map(formatObject).join(' ');
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info.message = `${message} ${rest}`;
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return info;
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});
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const myFormat = format.printf(({ level, message, label, timestamp } : any) => {
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return `${timestamp} [${label}] ${level}: ${message}`;
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});
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/**
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* Returns a winston logger configured to service
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*
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* @param {string} label Label appearing on logger
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* @param {string} filename Optional file to write log to
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*
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* @returns {object} Winston logger
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*/
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export function createLog (label : string, filename : string = null) {
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const tports : any[] = [ new (transports.Console)() ];
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const fmat : any = format.combine(
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all(),
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format.label({ label }),
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format.timestamp({format: 'YYYY-MM-DD HH:mm:ss.SSS'}),
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format.colorize(),
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myFormat,
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);
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let papertrailOpts : any;
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if (filename !== null) {
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tports.push( new (transports.File)({ filename }) );
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}
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return createLogger({
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format : fmat,
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transports : tports
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});
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}
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module.exports = { createLog };
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