Mailspring/packages/nylas-core/logger.js

const bunyan = require('bunyan')
const {getLogStreams} = require('./log-streams')
const NODE_ENV = process.env.NODE_ENV || 'unknown'

function createLogger(name, env = NODE_ENV) {
  const childLogs = new Map()
  const logger = bunyan.createLogger({
    name,
    env,
    serializers: bunyan.stdSerializers,
    streams: getLogStreams(name, env),
  })

  return Object.assign(logger, {
    forAccount(account = {}) {
      if (!childLogs.has(account.id)) {
        const childLog = logger.child({
          account_id: account.id,
          account_email: account.emailAddress,
        })
        childLogs.set(account.id, childLog)
      }
      return childLogs.get(account.id)
    },
  })
}

module.exports = {
  createLogger,
}