src/middleware/logger.js


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'use strict';

const winston = require('winston');

module.exports = function(app) {
  // Add a logger to our app object for convenience
  app.logger = winston;

  return function(error, req, res, next) {
    if (error) {
      const message = `${error.code ? `(${error.code}) ` : '' }Route: ${req.url} - ${error.message}`;
      
      if (error.code === 404) {
        winston.info(message);
      }
      else {
        winston.error(message);
        winston.info(error.stack);
      }
    }

    next(error);
  };
};