'use strict';

const util = require('util')
	, fs = require('fs')
	, unlink = util.promisify(fs.unlink)
	, stat = util.promisify(fs.stat)
	, readdir = util.promisify(fs.readdir)
	, uploadDirectory = require(__dirname+'/helpers/uploadDirectory.js');

async function deleteCaptchas() {

	try {
		const files = await readdir(`${uploadDirectory}captcha/`);
		if (files.length > 0) {
			console.log('Deleting old captchas:', files);
			files.forEach(file => {
				const filePath = `${uploadDirectory}captcha/${file}`;
				stat(filePath).then(stats => {
					const now = Date.now();
					const expiry = new Date(stats.ctime).getTime() + 6*1000*60; //6 minutes ahead
					if (now > expiry) {
						return unlink(filePath);
					}
					return;
				}).catch(e => console.error);
			});
		}
	} catch (err) {
		console.error(err);
	}

}

deleteCaptchas();
setInterval(deleteCaptchas, 6*1000*60);