index.js

const fs = require('fs');
const chalk = require('chalk');
const ms = require('ms');
const manager = require('./functions.js');
const {
	SOURCE_FILE_PATH,
	SOURCE_FOLDER_PATH,
	DATA_FOLDER_NAME,
	DATA_FOLDER_SEPERATOR,
	DESTINATION_PATH,
	INTERVALTIME,
} = require('./config.json');

// Making sure the necessary properties have been provided and they are valid
if (!SOURCE_FILE_PATH && !SOURCE_FOLDER_PATH)
	throw new TypeError(chalk.red.bold('Neither a source file or a source folder have been provided!'));
if (SOURCE_FILE_PATH && !fs.existsSync(SOURCE_FILE_PATH))
	throw new TypeError(chalk.red.bold(`The source file path ${chalk.yellow(SOURCE_FILE_PATH)} is not a valid path!`));
if (SOURCE_FOLDER_PATH && !fs.existsSync(SOURCE_FOLDER_PATH))
	throw new TypeError(
		chalk.red.bold(`The source folder path ${chalk.yellow(SOURCE_FOLDER_PATH)} is not a valid path!`)
	);
if (!DATA_FOLDER_NAME) throw new TypeError(chalk.red.bold('No name for the data folders has been provided!'));
if (!DATA_FOLDER_SEPERATOR) throw new TypeError(chalk.red.bold('No seperator for the data folders has been provided!'));
if (!DESTINATION_PATH) {
	throw new TypeError(chalk.red.bold('No destination path has been provided!'));
} else if (!fs.existsSync(DESTINATION_PATH.replace(/[^/]*$/, ''))) {
	throw new TypeError(
		chalk.red.bold(`The destiantion path ${chalk.yellow(DESTINATION_PATH.replace(/[^/]*$/, ''))} is not a valid path!`)
	);
}
if (!INTERVALTIME) {
	throw new TypeError(chalk.red.bold('No interval time has been provided!'));
} else if (!ms(INTERVALTIME) || /^\d+$/.test(INTERVALTIME)) {
	throw new TypeError(
		chalk.red.bold(
			`The interval time is not a valid number!\nYou can use ${chalk.yellow('d')} for days, ${chalk.yellow(
				'h'
			)} for hours, ${chalk.yellow('m')} for minutes, ${chalk.yellow('s')} for seconds and ${chalk.yellow(
				'ms'
			)} for milliseconds!`
		)
	);
}

// Make a directory for the data if it does not exist yet
manager.mkdir(DESTINATION_PATH);

// Do the process once at startup
manager.COPY();

// Set an interval for copying the file and/or the folder after a specific amount of time
setInterval(() => {
	// Making sure the necessary paths are are still valid
	if (SOURCE_FILE_PATH && !fs.existsSync(SOURCE_FILE_PATH))
		throw new TypeError(
			chalk.red.bold(`The source file path ${chalk.yellow(SOURCE_FILE_PATH)} is not a valid path anymore!`)
		);
	if (SOURCE_FOLDER_PATH && !fs.existsSync(SOURCE_FOLDER_PATH))
		throw new TypeError(
			chalk.red.bold(`The source folder path ${chalk.yellow(SOURCE_FOLDER_PATH)} is not a valid path anymore!`)
		);
	if (!fs.existsSync(DESTINATION_PATH.replace(/[^/]*$/, '')))
		throw new TypeError(
			chalk.red.bold(
				`The destiantion path ${chalk.yellow(DESTINATION_PATH.replace(/[^/]*$/, ''))} is not a valid path anymore!`
			)
		);

	// Copy
	manager.COPY();
}, ms(INTERVALTIME)); // Interval time

// Handling errors
process.on('unhandledRejection', error => {
	if (!error) return process.exit(1);
	return console.error('Unhandled promise rejection:', error);
});