devData/importProducts.js

const fs = require('fs');
const mongoose = require('mongoose');
const dotenv = require('dotenv');
const Product = require('../models/productModel');
const Category = require('../models/categoryModel');
const Provider = require('../models/providerModel');

dotenv.config({ path: './config.env' });

const DB = process.env.DATABASE.replace(
  '<PASSWORD>',
  process.env.DATABASE_PASSWORD,
);

mongoose
  .connect(DB)
  .then(() => console.log('DB connection successful!'))
  .catch((err) => {
    console.log('DB connection error:', err);
  });

// Read JSON file
const products = JSON.parse(
  fs.readFileSync(`${__dirname}/products-sample.json`, 'utf-8'),
);

// Import data into DB
const importData = async () => {
  try {
    await Product.create(products);
    console.log('Data successfully loaded!');
  } catch (err) {
    console.log(err);
  }
  process.exit();
};

// Delete all data from DB
const deleteData = async () => {
  try {
    await Product.deleteMany();
    await Category.deleteMany();
    await Provider.deleteMany();
    console.log('Data successfully deleted!');
  } catch (err) {
    console.log(err);
  }
  process.exit();
};

if (process.argv[2] === '--import') {
  importData();
} else if (process.argv[2] === '--delete') {
  deleteData();
}