pl2mp3/db.js

Watches Youtube Playlists and automatically downloads & converts them to mp3

const low = require("lowdb");
const FileSync = require("lowdb/adapters/FileSync");
const fs = require("fs");
const pl = require("./playlist");
const path = require("upath")
const sanitize = require("sanitize-filename");

let db
let adapter

function init(dbPath) {
	adapter = new FileSync(dbPath);
	db = low(adapter);
}

/**
 * check database and folders
 */
async function prepare(basePath, config) {
	//check if playlist exists
	if (!db.has("playlists").value()) db.set("playlists", []).write();
	//check if there is a object for each array
	for (const playlist of config.playlists) {
		//playlist doesnt exist
		if (db.get("playlists").find({
				link: playlist.link
			}).isEmpty().value()) {
			let title = await pl.getPlaylistInformation(playlist.link, 1);
			db.get("playlists")
				.push({
					link: playlist.link,
					title: sanitize(title.title),
					videos: [],
				}).write();

			if (!fs.existsSync(path.join(basePath, sanitize(title.title)))) {
				fs.mkdirSync(path.join(basePath, sanitize(title.title)));
			}
		}
	}
}

async function checkforNewVideos(playlist) {
	let dlVideos = db.get("playlists").find({
		link: playlist
	}).get("videos").value()

	let listInfo = await pl.getPlaylistInformation(playlist, 9999);
	let newVideos = listInfo.items.map(obj => {
		return obj.url_simple
	})
	return newVideos.filter(v => {
		return !dlVideos.includes(v);
	})
}
async function getPlaylistPath(base, playlist) {
	return path.join(base, db.get("playlists").find({
		link: playlist
	}).get("title").value())
}
async function addVideo(playlist, link) {
	db.get("playlists").find({
			link: playlist
		})
		.get("videos").push(link).write()
}
module.exports.checkVideos = checkforNewVideos;
module.exports.prepare = prepare;
module.exports.init = init;
module.exports.getPlaylistPath = getPlaylistPath;
module.exports.addVideo = addVideo