euterpe-source/packages/preprocessor/src/generate_db.ts

import { Collection, Ref, RefTo, Song, DB, } from "@euterpe.js/music-library"
import { songs } from "./songs_list"

export function generate_db() {
	console.log(songs)
	// construct db
	let db = new DB
	let collections: string[] = new Array()
	let new_songs = []
	const path_char = songs[0].includes("\\") ? "\\" : "/"

	//create collections by folder names
	for (let i = 0; i < songs.length; i++) {
		const song = songs[i]
		const last_i = song.lastIndexOf(path_char)
		const collection_name = song.slice(song.slice(0, last_i).lastIndexOf(path_char) + 1, last_i)
		/*
		const foreforelast_i = song.slice(0, forelast_i - 1)
		const foreforeforelast_i = song.slice(0, foreforelast_i - 1).lastIndexOf("\\")
		*/
		if (!collections.includes(collection_name)) {
			console.log(`creating collection ${collection_name}`)
			db.add([new Collection({
				name: collection_name,
				songs: [],
				artists: [],
			})])
			collections.push(collection_name)
		}

		let col = db.collections.find(col => col.name == collection_name)!
		let col_id = col.id
		new_songs.push({ song: song, collection_id: col_id! })
	}

	//create songs
	for (let i = 0; i < new_songs.length; i++) {
		let song = new_songs[i]
		const last_i = song.song.lastIndexOf(path_char)

		const name = song.song.slice(last_i + 1)
		const song_url = song.song.slice(song.song.indexOf(`public${path_char}`) + 7)
		const db_song = new Song({
			name: name.slice(0, name.lastIndexOf(".")),
			artists: [],
			url: new URL(`${window.location.href}${song_url}`.replaceAll("\\", "/")),
			duration: 0,
			remix_artists: [],
			in_collection: new Ref(RefTo.Collections, song.collection_id)
		})
		db.add([db_song])
	}
	console.log(db)
	return db
}