function Log (options) { this.levels = { 'DEBUG': 5, 'INFO': 4, 'NOTICE': 3, 'WARN': 2, 'ERROR': 1, 'FATAL': 0 } this.options = options || {} if (this.options.loglevel) { // DEBUG, INFO, NOTICE, WARN, ERROR, FATAL this.loglevel = this.levels[this.options.loglevel] } else { this.loglevel = 2 } if (this.options.name) { this.name = this.options.name } else { this.name = require('./package.json').name } if (this.options.hostname) { this.hostname = this.options.hostname } else { let os = require('os') this.hostname = os.hostname() } if (this.options.file) { this.fs = require('fs') } this.info = function (message, tags) { if (this.loglevel >= this.levels.INFO) { return this.log('INFO', message, tags) } else { return '' } } this.notice = function (message, tags) { if (this.loglevel >= this.levels.NOTICE) { return this.log('NOTICE', message, tags) } else { return '' } } this.fatal = function (message, tags) { if (this.loglevel >= this.levels.FATAL) { return this.log('FATAL', message, tags) } else { return '' } } this.warn = function (message, tags) { if (this.loglevel >= this.levels.WARN) { return this.log('WARN', message, tags) } else { return '' } } this.error = function (message, tags) { if (this.loglevel >= this.levels.ERROR) { return this.log('ERROR', message, tags) } else { return '' } } this.debug = function (message, tags) { if (this.loglevel >= this.levels.DEBUG) { return this.log('DEBUG', message, tags) } else { return '' } } this.log = function (tag, message, tags) { let tadd = '' if (typeof tags !== 'undefined' && typeof tags === 'string') { if (Array.isArray(tags)) { tadd = ' #' + tags.join(' #') } else if (tags.includes(' ')) { tadd = ' #' + tags.split(' ').join(' #') } else if (tags.includes(',')) { tadd = ' #' + tags.split(',').join(' #') } else { tadd = ' #' + tags } } else { tadd = tags} let msg = this.getDate() + '\t' + this.hostname + '\t' + this.name + '\t' + tag + '\t' + message + tadd switch (tag) { case 'INFO': console.info(msg) break case 'NOTICE': console.log(msg) break case 'WARN': console.warn(msg) break case 'ERROR': console.error(msg) break case 'FATAL': console.error(msg) break case 'DEBUG': console.log(msg) break default: console.log(msg) } if (this.options.file) { this.fs.appendFile(this.options.file, msg + '\n', function (error) { if (error) { console.error('Cannot write to File ' + this.options.file) } }) } return msg } this.getDate = function () { var tzoffset = (new Date()).getTimezoneOffset() * 60000 // offset in milliseconds var localISOTime = (new Date(Date.now() - tzoffset)).toISOString().slice(0, -1) return localISOTime.split('.')[0].trim() } return this } module.exports = Log