pustovitDmytro / winston-console-transport

import os from 'os';

import Transport from 'winston-transport';

import { isLoggable } from './utils/common';

import { defaultLogger, defaultSanitizer, defaultMaxListeners } from './defaults';

import { MESSAGE, LEVEL } from './constants';

export default class Console extends Transport {

    constructor(options = {}) {

        super(options);

        this.name = options.name || 'console';

        this.eol = options.eol || os.EOL;

        this.logger = options.logger || console;

        this.fallBackLogger = options.fallBackLogger || defaultLogger;

        this.handlers = options.levels || {};

        this.sanitizer = options.sanitizer || defaultSanitizer;

        this.setMaxListeners(options.maxListeners || defaultMaxListeners);

    }

    log(info, callback) {

        setImmediate(() => {

            this.emit('logged', info);

        });

        const level = info[LEVEL];

        const message = info[MESSAGE];

        const log = [

            this.handlers[level],

            this.logger[this.handlers[level]],

            this.logger[level],

            this.fallBackLogger

        ].find((element) => isLoggable(element));

        log(this.sanitizer(message));

        callback();

    }

}