GRH/water-api/src/utils/logger.ts

import winston from 'winston';

const { combine, timestamp, printf, colorize, errors } = winston.format;

const logFormat = printf(({ level, message, timestamp, stack }) => {
  return `${timestamp} [${level}]: ${stack || message}`;
});

const getLogLevel = (): string => {
  const env = process.env.NODE_ENV || 'development';
  switch (env) {
    case 'production':
      return 'warn';
    case 'test':
      return 'error';
    default:
      return 'debug';
  }
};

const logger = winston.createLogger({
  level: getLogLevel(),
  format: combine(
    errors({ stack: true }),
    timestamp({ format: 'YYYY-MM-DD HH:mm:ss' })
  ),
  transports: [
    new winston.transports.Console({
      format: combine(
        colorize({ all: true }),
        timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
        logFormat
      ),
    }),
  ],
  exitOnError: false,
});

export default logger;