mongo.js

const mongoose = require('mongoose')

if(process.argv.length < 3) {
  console.log('Please provide the password as an argument: node mongo.js <password>')
  process.exit(1)
}

const password = process.argv[2]

const url = `mongodb+srv://fullstack:${password}@cluster0.fyvhy.mongodb.net/notebook?retryWrites=true&w=majority`

mongoose.connect(url, { useNewUrlParser: true, useUnifiedTopology : true, useFindAndModify:false, useCreateIndex: true })

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

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

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

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

else {

  console.log('phonebook:')

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