Logmanager.js

import fs from 'fs'
const fse = require('fs-extra')
const chalk = require('chalk')
const log = console.log

class LoggerManager {
  constructor(page, reportFileName) {
    this._page = page
    this._reportFileName = reportFileName
    this._requests = []
  }

  addLineBreak() {
    fse.appendFile(`./src/logs/${this._reportFileName}.log`, '\r\n')
  }

  addToReport(data) {
    this.addLineBreak()
    fs.appendFile(`./src/logs/${this._reportFileName}.log`, data, () => {})
    this.addLineBreak()
  }

  saveJsonReport(data) {
    this.addLineBreak()
    fse.appendFile(
      `./src/logs/${this._reportFileName}.log`,
      JSON.stringify(data),
    )
    this.addLineBreak()
  }

  printDuplicatedRequests() {
    const results = [
      ...this._requests
        .reduce((mp, o) => {
          const key = JSON.stringify([o.url, o.method, o.data])
          if (!mp.has(key)) mp.set(key, {...o, count: 0})
          mp.get(key).count++
          return mp
        }, new Map())
        .values(),
    ]

    // eslint-disable-next-line func-names
    const dupped = results.filter(function(el) {
      return el.count > 1
    })

    if (dupped.length > 0) {
      this.saveJsonReport(dupped)
    }
  }

  startInterceptor() {
    try {
      fs.unlinkSync(`./src/logs/${this._reportFileName}.log`)
    } catch (err) {
      log(chalk.blue(`Creating new log for ${this._reportFileName}`))
      fse.outputFileSync(`./src/logs/${this._reportFileName}.log`, '')
    }

    this._page.on('request', interceptedRequest => {
      if (interceptedRequest.resourceType() === 'xhr') {
        this._requests.push({
          url: interceptedRequest.url(),
          method: interceptedRequest.method(),
          data:
            interceptedRequest.postData() == undefined
              ? ''
              : interceptedRequest.postData(),
        })
      }
      if (interceptedRequest.resourceType() === 'image') {
         interceptedRequest.abort()
      } else {
        interceptedRequest.continue()
      }
    })

    this._page.on('pageerror', ({message}) => this.addToReport(message))
  }

  resetRequests() {
    this._requests = []
  }

  addRequest(request) {
    this._requests.push(request)
  }

  set reportFileName(reportFileName) {
    this._reportFileName = reportFileName
  }
}

export default LoggerManager