shared/extra-utils/miscs/email.ts

   1 import { ChildProcess } from 'child_process'
   2 import { randomInt } from '../../core-utils/miscs/miscs'
   3 import { parallelTests } from '../server/servers'
   4
   5 const MailDev = require('maildev')
   6
   7 class MockSmtpServer {
   8
   9   private static instance: MockSmtpServer
  10   private started = false
  11   private emailChildProcess: ChildProcess
  12   private emails: object[]
  13
  14   private constructor () { }
  15
  16   collectEmails (emailsCollection: object[]) {
  17     return new Promise<number>((res, rej) => {
  18       const port = parallelTests() ? randomInt(1000, 2000) : 1025
  19       this.emails = emailsCollection
  20
  21       if (this.started) {
  22         return res(undefined)
  23       }
  24
  25       const maildev = new MailDev({
  26         ip: '127.0.0.1',
  27         smtp: port,
  28         disableWeb: true,
  29         silent: true
  30       })
  31
  32       maildev.on('new', email => {
  33         this.emails.push(email)
  34       })
  35
  36       maildev.listen(err => {
  37         if (err) return rej(err)
  38
  39         this.started = true
  40
  41         return res(port)
  42       })
  43     })
  44   }
  45
  46   kill () {
  47     if (!this.emailChildProcess) return
  48
  49     process.kill(this.emailChildProcess.pid)
  50
  51     this.emailChildProcess = null
  52     MockSmtpServer.instance = null
  53   }
  54
  55   static get Instance () {
  56     return this.instance || (this.instance = new this())
  57   }
  58 }
  59
  60 // ---------------------------------------------------------------------------
  61
  62 export {
  63   MockSmtpServer
  64 }