path: root/server.ts

import express from "express";
import cookieParser from "cookie-parser";
import cookieSession from "cookie-session";
import passport from "passport";
import {Strategy as SpotifyStrategy} from "passport-spotify";
import bodyParser from "body-parser";
import morgan from "morgan";
import stringSim from "string-similarity";
import _ from "lodash";
import SpotifyWebApi from "spotify-web-api-node";

const doubleMetaphone = require('double-metaphone');

const configData = require('./config.json');
import Discogs from "./apis/discogs";
import TimeLyrics, {Song} from "./apis/music163";
const functions = require('./functions');

const authRouter = require('./routers/authentication');
const pageRouter = require('./routers/pages');
const playbackRouter = require('./routers/playback');
const genreRouter = require('./routers/genre');

const PORT = 9000;
const appId = configData.CLIENT_ID;
const appSecret = configData.CLIENT_SECRET;
const loginPage = '/auth/login';

passport.serializeUser((user, done) => {
    done(null, user);
});

passport.deserializeUser(function (obj, done) {
    done(null, obj);
});

passport.use(
    new SpotifyStrategy(
        {
            clientID: appId,
            clientSecret: appSecret,
            callbackURL: 'http://localhost:9000/auth/callback',
        },
        function (accessToken, refreshToken, expires_in, profile, done) {
            process.nextTick(function () {
                let newProfile = {
                    ...profile,
                    accessToken: accessToken,
                    refreshToken: refreshToken,
                    expiresOn: (new Date((new Date()).getTime() + (expires_in - 60) * 1000)).toISOString()
                }
                return done(null, newProfile);
            });
        }
    )
);

const app = express();
app.use(morgan('dev'));
app.set('view engine', 'ejs');
app.set('views', "public/views");

app.use(cookieParser('wd3pwvDDxiygaxI9stLCjofeKpX9vO9d'));
app.use(cookieSession({
    name: 'session',
    keys: ['wd3pwvDDxiygaxI9stLCjofeKpX9vO9d', 'RCRMPAxTCLxeHlQaYeW4GKzvVKV8lgjB']
}));
app.use(passport.initialize());
app.use(passport.session());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use(express.static('public'));
app.use('/auth', authRouter);
app.use('/user', pageRouter);
app.use('/playback', playbackRouter);
app.use('/genre', genreRouter);

app.get('/', (req, res) => {
    if (req.user == null)
        req.session.returnTo = '/';

    // Prevent Caching
    res.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1
    res.setHeader("Pragma", "no-cache"); // HTTP 1.0
    res.setHeader("Expires", "0"); // Proxies

    res.render('main.ejs', { req: req });
});

app.get('/discogs/search', async (req, res) => {
    res.render('search.ejs');
});

app.get('/discogs', async (req, res) => {
    Discogs.search(req.query.artist as string, req.query.track as string, req.query.type as string, (err, data, rateLimit) => {
        res.send(data);
    });
});

app.get('/163', async (req, res) => {
    const title = req.query.title as string;
    const artist = req.query.artist as string;
    let results = (await TimeLyrics.search(title, artist))['result']['songs'];
    for (const result of results) {
        if (result.name.toLowerCase() === title.toLowerCase()) {
            if (result.artists[0].name.toLowerCase() === artist.toLowerCase()) {
                return res.send(await TimeLyrics.lyrics(result.id));
            }
        }
    }
    res.send(results);
});

app.post('/163/lyrics', async (req, res) => {
    function processResults(results: Song[]) {
        let score = -1
        let currentResult;

        if (results == null)
            return false;

        for (const result of results) {
            let name = functions.simplifyTitle(result.name);
            let nameAdj = functions.adjustTitle(name);
            let resultAlbum = functions.simplifyTitle(result.album.name);
            let resultAlbumAdj = functions.simplifyTitle(resultAlbum);

            let resultArtists: string[] = result.artists.map(x => functions.simplifyTitle(x.name));

            // String similarities
            let trackSim = 100 * stringSim.compareTwoStrings(name, track);  // Between Song and Song
            let albumSim = 100 * stringSim.compareTwoStrings(resultAlbum, album);  // Between Album and Album
            let trackAdjSim = 100 * stringSim.compareTwoStrings(nameAdj, trackAdj);  // Between Song and Song Adj.
            let albumAdjSim = 100 * stringSim.compareTwoStrings(resultAlbumAdj, albumAdj);  // Between Album and Album Adj.

            // Same as in /genre
            let artistSims = [].concat.apply([], resultArtists.map(x => artists.map(y => 100 * stringSim.compareTwoStrings(x, y))));
            artistSims = artistSims.reduce((a: number, b: number) => a + b, 0) / ((artists.length + resultArtists.length) / 2);

            // Lower score to catch remixes, covers and stuff
            if (name.match(/\([^)]*\)/g)) {
                trackSim *= 0.8;
                albumSim *= 0.8;
            }

            const accuracyThresh = 50;

            if ((trackSim + albumSim + artistSims) / 3 >= accuracyThresh && score < (trackSim + albumSim + artistSims) / 3) {
                score = (trackSim + albumSim + artistSims) / 3;
                currentResult = result;
            } else if ((trackAdjSim + albumAdjSim + artistSims) / 3 >= accuracyThresh && score < 0.8 * (trackAdjSim + albumAdjSim + artistSims) / 3) {
                score = 0.95 * (trackSim + albumSim + artistSims) / 3;
                currentResult = result;
            } else if (trackSim >= accuracyThresh && score < trackSim) {
                // Track title matches result
                score = trackSim;
                currentResult = result;
            } else if (albumSim >= accuracyThresh && score < albumSim * 0.6) {
                // Album title matches result
                score = albumSim * 0.6;
                currentResult = result;
            } else if (trackAdjSim >= accuracyThresh && score < trackAdjSim * 0.5) {
                // Adjusted: Track title matches result
                score = trackAdjSim * 0.5;
                currentResult = result;
            } else if (albumAdjSim >= accuracyThresh && score < albumAdjSim * 0.45) {
                // Adjusted: Album title matches result
                score = albumAdjSim * 0.45;
                currentResult = result;
            } else if (artistSims >= accuracyThresh && score < artistSims * 0.5) {
                score = artistSims * 0.5;
                currentResult = result;
            }

            // console.log(`${result.name}`)
            // console.log(`\tScore:         ${score}`);
            // console.log(`\tAll:           ${(trackSim + albumSim + artistSims) / 3}`)
            // console.log(`\tAll Adj:       ${(trackAdjSim + albumAdjSim + artistSims) / 3}`)
            // console.log(`\tTrack:         ${name} - ${track}: ${trackSim}`);
            // console.log(`\tAlbum:         ${resultAlbum} - ${album}: ${albumSim}`);
            // console.log(`\tTrack Adj:     ${nameAdj} - ${trackAdj}: ${trackAdjSim}`);
            // console.log(`\tAlbum Adj:     ${resultAlbumAdj} - ${albumAdj}: ${albumAdjSim}`);
            // console.log(`\tArtists:       ${resultArtists} - ${artists}: ${artistSims}`);
        }

        if (currentResult != null) {
            // console.log(currentResult);
            return {
                id: currentResult.id,
                confidence: score
            }
        }

        return false;
    }

    if (!req.body.artists || !Array.isArray(req.body.artists) || !req.body || !req.body.name
        || !req.body.album || !req.body.album.name) {
        res.contentType("application/json");
        return res.status(400).send('{"message": "Invalid body. Please provide Spotify Track object"}')
    }

    // Body should be a spotify track object, just like /genre
    const body = req.body as SpotifyApi.TrackObjectFull;
    const artist = functions.simplifyTitle(body.artists[0].name);
    const artists = body.artists.map(x => functions.simplifyTitle(x.name));
    const track = functions.simplifyTitle(body.name);
    const album = functions.simplifyTitle(body.album.name);
    const trackAdj = functions.adjustTitle(track);
    const albumAdj = functions.adjustTitle(album);


    let results = (await TimeLyrics.search(trackAdj, artist))['result']['songs'];

    let result = processResults(results);

    if (!result) {
        return res.status(404).send('Song not found in search');
    }
    let lyrics = (await TimeLyrics.lyrics(result.id)).lrc;
    if (!lyrics)
        return res.sendStatus(404);

    let lines = lyrics['lyric'].split(/\r?\n/);
    res.send(lines);
});

app.get('/time-sync', async (req, res) => {
    res.render('time-sync.ejs');
});

app.post('/correlate', async (req, res) => {

    let genius = req.body['genius'];
    genius = genius
        .replace(/\[.*\]/g, '')  // Remove Verse Indicators
        .replace('-', ' ')  // Replace dashed words with seperate words
        .replace(/[^\w\s]|_/g, "")  // Remove non-alphanumeric characters
        .replace(/\s+/g, " ").trim()  // Remove extra spaces
        .split(' ');  // Extract words

    let lyrics163 = JSON.parse(req.body['163']).join(' ');
    lyrics163 = lyrics163
        .replace(/\[(\d+):(\d+)\.(\d+)\]/g, '')  // Remove TimeStamp Indicators
        .replace('-', ' ')  // Replace dashed words with seperate words
        .replace(/[^\w\s]|_/g, "")  // Remove non-alphanumeric characters
        .replace(/\s+/g, " ").trim()  // Remove extra spaces
        .split(' ');  // Extract words

    console.log(lyrics163)
    console.log(genius)

    for (let i = 0; i < genius.length; i++) {
        genius[i] = { word: genius[i], metaphone: doubleMetaphone(genius[i]) };
    }
    for (let i = 0; i < lyrics163.length; i++) {
        lyrics163[i] = { word: lyrics163[i], metaphone: doubleMetaphone(lyrics163[i]) };
    }

    res.send({ genius, lyrics163 });
});

app.listen(PORT);
console.log("App listening on port " + PORT);
module.exports = app;