seeder.js

const fs = require('fs');
const mongoose = require('mongoose');
const colors = require('colors');
const dotenv = require('dotenv');

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

// Load models
const Bootcamp = require('./models/Bootcamp');
const Course = require('./models/Course');
const User = require('./models/User');
const Review = require('./models/Review');


// Connect to DB
mongoose.connect(process.env.MONGO_URI, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
    useUnifiedTopology: true
});

// Read JSON files
// dirname = curernt directory name
const bootcamps = JSON.parse(fs.readFileSync(`${__dirname}/_data/bootcamps.json`, 'utf-8'));
const courses = JSON.parse(fs.readFileSync(`${__dirname}/_data/courses.json`, 'utf-8'));
const user = JSON.parse(fs.readFileSync(`${__dirname}/_data/users.json`, 'utf-8'));
const review = JSON.parse(fs.readFileSync(`${__dirname}/_data/reviews.json`, 'utf-8'));

// Import into DB
const importData = async () => {
    try {
        await Bootcamp.create(bootcamps);
        await Course.create(courses);
        await User.create(user);
        await Review.create(review);
        console.log('Data Imported...'.green.inverse);
        process.exit();
    } catch (err) {
        console.error(err);
    }
}

// Delete Data
const deleteData = async () => {
    try {
        await Bootcamp.deleteMany();
        await Course.deleteMany();
        await User.deleteMany();
        await Review.deleteMany();
        console.log('Data Destroyed...'.red.inverse);
        process.exit();
    } catch (err) {
        console.error(err);
    }
}

// When seeder is run, allow argument to know whether to us Import or Delete function
if (process.argv[2] === '-i') { // terminal: node seeder -i 
    importData();
}
else if (process.argv[2] === '-d'){ // terminal: node seeder -d
    deleteData();
}