thunder-log/logger.js

The logger used for Shared Services Logging.

const { format, createLogger, transports } = require("winston");

// formatting for all logs to the console
const consoleFormat = format.printf(({ CorrelationId, SequenceNumber, level, timestamp, LoggerID, UserId, Summary, Action, ActionTarget, ActionResult, ExceptionDetails, StackInfo, AdditionalDetails }) => {
  let log = `[${timestamp}] ${level} -VMG- `;
  (CorrelationId) ? log += `${CorrelationId} ` : '';
  (SequenceNumber) ? log += `${SequenceNumber} ` : '';
  (LoggerID) ? log += `${LoggerID} ` : '';
  (UserId) ? log += `${UserId} ` : '';
  (ExceptionDetails) ? log += `(${ExceptionDetails}) ` : '';
  log += `${Summary} `;
  (Action) ? log += `/${Action} ` : '';
  (ActionTarget) ? log += `${ActionTarget} ` : '';
  (ActionResult) ? log += `(${ActionResult}) ` : '';
  (StackInfo) ? log += `${StackInfo} ` : '';
  (AdditionalDetails) ? log += `: ${AdditionalDetails}` : '';
  return log;
});

// formatting for all logs to file in json
const jsonFormat = format.printf(({ CorrelationId, SequenceNumber, level, timestamp, LoggerID, UserId, Summary, Action, ActionTarget, ActionResult, ExceptionDetails, StackInfo, AdditionalDetails }) => {
  let log = `"ApplicationId":"VMG", "Severity":"${level}", "Timestamp":"${timestamp}", "Summary":"${Summary}"`;
  (CorrelationId) ? log += `"CorrelationId":"${CorrelationId}", ` : '';
  (SequenceNumber) ? log += `"SequenceNumber":"${SequenceNumber}", ` : '';
  (LoggerID) ? log += `"LoggerId":"${LoggerID}", ` : '';
  (UserId) ? log += `"UserId":"${UserId}", ` : '';
  (ExceptionDetails) ? log += `"ExceptionDetails":"${ExceptionDetails}", ` : '';
  (Action) ? log += `${Action} ` : '';
  (ActionTarget) ? log += `"ActionTarget":"${ActionTarget}", ` : '';
  (ActionResult) ? log += `"ActionResult":"${ActionResult}", ` : '';
  (StackInfo) ? log += `StackInfo":"${StackInfo}", ` : '';
  (AdditionalDetails) ? log += `"AdditionalDetails":"${AdditionalDetails}"` : '';
  return `{ ${log} }`;
})

// development logger with transports to console and file (log.txt)
const devLogger = () => {
  return createLogger({
    level: 'debug',
    transports: [
      new transports.Console({
        format: format.combine(
          format.timestamp({ format: 'YYYY-DD-MM HH:mm:ss.SSS' }),
          format.colorize(),
          format.prettyPrint(),
          consoleFormat
        )
      }),
      new transports.File({
        filename:'log.txt',
        format: format.combine(
          format.timestamp({ format: 'YYYY-DD-MM HH:mm:ss.SSS' }),
          jsonFormat
        )
      })],
  });
};

// production logger with transport to console
const awsLogger = () => {
  return createLogger({
    level: 'info',
    transports: [new transports.Console()],
    format: format.combine(
      format.timestamp({ format: 'YYYY-DD-MM HH:mm:ss.SSS' }),
      jsonFormat,
    )
  });
};

module.exports = {
  devLogger,
  awsLogger
};