mongo.js

const mongoose = require('mongoose')

if (process.argv.length < 3) {
  console.log('give password as argument')
  process.exit(1)
}

const password = process.argv[2]

const url =
      `mongodb+srv://phonebook-admin:${password}@phonebook.sbnzc1c.mongodb.net/phonebookdb?retryWrites=true&w=majority`

mongoose.set('strictQuery', false)
mongoose.connect(url)

const personSchema = new mongoose.Schema({
  name: String,
  number: String,
})

const Person = mongoose.model('Person', personSchema)

if (process.argv.length === 3) {

  Person.find({}).then(result => {
    console.log('Phonebook:')
    result.forEach(person => {
      console.log(person.name, person.number)
    })
    mongoose.connection.close()
  })
}

if (process.argv.length === 5) {

  const name = process.argv[3]
  const number = process.argv[4]
  
  const person = new Person({
    name: `${name}`,
    number: `${number}`
  })

  person.save().then(result => {
    console.log(`Added ${name} with number ${number} to phonebook`)
    mongoose.connection.close()
  })
}