mrfrys-node-server/src/middlewares/reqlogger.middleware.ts

import logger from '../utils/logger'
import type { Response, NextFunction } from 'express'
import type { Request } from '../types/basicTypes'

interface Options {
  loggableKeywords: Array<string>
  loggableModules: Array<string>
  exceptions: Array<string>
  excludeFromStats: Array<string>
}

export default function (options: Options): any {
  const loggableKeywords = options ? options.loggableKeywords : undefined
  const loggableModules = options ? options.loggableModules : undefined
  const exceptions = options.exceptions || []
  const excludeFromStats = options.excludeFromStats || []

  return function (req: Request, res: Response, next: NextFunction) {
    res.on('finish', function () {
      // TODO: test this
      const isException = exceptions.some((ex) => {
        return req.url.includes(ex)
      })

      if (isException) {
        return
      }

      let hostname = 'NOHOST'
      if (req.hostname) {
        hostname = req.hostname.replace('www.', '').split('.')[0]
      } else {
        logger.Log('Hostname is undefined!', logger.GetColor('redbg'))
        console.log(req.body)
        console.log(req.query)
        console.log(req.headers)
      }

      const hasLoggableKeyword =
        loggableKeywords &&
        loggableKeywords.some((keyword) => {
          return req.url.includes(keyword)
        })
      const hasLoggableModule =
        loggableModules &&
        loggableModules.some((keyword) => {
          return hostname.includes(keyword)
        })
      const toLog = hasLoggableModule || hasLoggableKeyword

      logger.LogReq(req, true, res.statusCode)
      if (toLog) {
        logger.LogReq(req)
      }

      const shouldLogStat = !excludeFromStats.some((ex) => {
        return req.url.includes(ex)
      })

      if (res.statusCode !== 404 && shouldLogStat) {
        logger.LogStat(
          req.url,
          hostname,
          req.session && req.session.user ? req.session.user.id : 'NOUSER'
        )
      }
    })
    next()
  }
}