mongo.js

/*global process*/

const mongoose = require('mongoose')

if (process.argv.length < 3) {
  console.log('the format is: node mongo.js password Anna 040-1234556')
  process.exit(1)
}

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

  const password = process.argv[2]

  const url = `mongodb+srv://admina:${password}@cluster0.zeecn.mongodb.net/myFirstDatabase?retryWrites=true&w=majority`

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

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

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

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

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

}

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

  const password = process.argv[2]

  const url = `mongodb+srv://admina:${password}@cluster0.zeecn.mongodb.net/myFirstDatabase?retryWrites=true&w=majority`

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

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

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

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

}