mongo.js

const mongoose = require('mongoose');

if (process.argv.length < 3) {
  console.log('Use appropriate command line parameter');
  process.exit(1);
}

const password = encodeURIComponent(process.argv[2]);
const url = `mongodb+srv://kartiksrivastava19:${password}@cluster1.h50krin.mongodb.net/phonebookApp?retryWrites=true&w=majority`;

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

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

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

if (process.argv.length === 3) {
  Person.find({}).then((result) => {
    console.log('phonebook:');
    result.forEach((contact) => {
      console.log(`${contact.name} ${contact.number}`);
    });
    mongoose.connection.close();
  });
} else {
  const individual = new Person({
    name: process.argv[3],
    number: process.argv[4],
  });

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