import * as cluster from 'cluster'; import chalk from 'chalk'; import * as dateformat from 'dateformat'; export default class Logger { private domain: string; private color?: string; private parentLogger: Logger; constructor(domain: string, color?: string) { this.domain = domain; this.color = color; } public createSubLogger(domain: string, color?: string): Logger { const logger = new Logger(domain, color); logger.parentLogger = this; return logger; } public log(level: string, message: string, important = false): void { const domain = this.color ? chalk.keyword(this.color)(this.domain) : chalk.white(this.domain); if (this.parentLogger) { this.parentLogger.log(level, `[${domain}]\t${message}`, important); } else { const time = dateformat(new Date(), 'HH:MM:ss'); const process = cluster.isMaster ? '*' : cluster.worker.id; const log = `${chalk.gray(time)} ${level} ${process}\t[${domain}]\t${message}`; console.log(important ? chalk.bold(log) : log); } } public error(message: string | Error): void { // 実行を継続できない状況で使う this.log(chalk.red.bold('ERROR'), chalk.red.bold(message.toString())); } public warn(message: string, important = false): void { // 実行を継続できるが改善すべき状況で使う this.log(chalk.yellow.bold('WARN'), chalk.yellow.bold(message), important); } public succ(message: string, important = false): void { // 何かに成功した状況で使う this.log(chalk.blue.green('DONE'), chalk.green.bold(message), important); } public info(message: string, important = false): void { // それ以外 this.log(chalk.blue.bold('INFO'), message, important); } }