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import axios from 'axios';
import { logger } from '../logger.js';
import { WebSocket } from 'ws';
export namespace SpotifyClient {
let clients = new Set<WebSocket>();
let interval: NodeJS.Timeout;
let acceptingClients = false;
let authenticationFailed = false;
let accessToken: string;
let refreshToken: string;
export const addClient = (client: WebSocket) => {
if (acceptingClients) {
clients.add(client);
} else {
client.close();
}
}
const apiTokenUrl = 'https://accounts.spotify.com/api/token';
const spotifyClientHeaders = {
'Authorization': 'Basic ' + Buffer.from(process.env.SPOTIFY_CLIENT_ID + ':' + process.env.SPOTIFY_CLIENT_SECRET).toString('base64'),
'Content-Type': 'application/x-www-form-urlencoded',
}
const handleApiError = (err: any, verb: string) => {
if (err.response?.data?.error) {
logger.error(`Failed to ${verb} access token: ${err.message}: ${err.response.data.error}`);
} else {
logger.error(`Failed to get access token: ${err.message} (${err.response.status} ${err.response.statusText} ${err.response.data.error})`);
}
accessToken = undefined;
refreshToken = undefined;
}
export const requestAccessToken = async () => {
logger.info('Requesting access token from Spotify');
await axios.post(apiTokenUrl, {
grant_type: 'authorization_code',
code: process.env.SPOTIFY_AUTH_CODE,
redirect_uri: process.env.SPOTIFY_REDIRECT_URI,
},
{ headers: spotifyClientHeaders,
}).then(res => {
logger.info('Authenticated with Spotify');
accessToken = res.data.access_token;
}).catch(err => {
handleApiError(err, 'request');
});
}
export const refreshAccessToken = async () => {
logger.info('Refreshing access token from Spotify');
await axios.post(apiTokenUrl, {
grant_type: 'refresh_token',
refresh_token: refreshToken,
},
{ headers: spotifyClientHeaders,
}).then(res => {
logger.info('Refreshed access token from Spotify');
accessToken = res.data.access_token;
}).catch(err => {
handleApiError(err, 'refresh');
});
}
export const initialise = async () => {
if (!accessToken) {
await requestAccessToken();
if (!accessToken) {
logger.error('Failed to get access token, giving up permanently');
authenticationFailed = true;
return;
}
}
await updateTimeout();
acceptingClients = true;
}
const updateTimeout = async () => {
await update();
interval = setTimeout(updateTimeout, 5000);
}
export const update = async () => {
if (authenticationFailed) {
return;
}
clients.forEach(client => {
if (client.readyState !== WebSocket.OPEN) {
clients.delete(client);
}
});
if (clients.size === 0) {
return;
}
await axios.get('https://api.spotify.com/v1/me/player/currently-playing', {
headers: {
'Authorization': 'Bearer ' + accessToken,
}
}).then(async (res) => {
if (res.status === 401) {
logger.info('Access token expired, refreshing');
await refreshAccessToken();
if (!accessToken) {
authenticationFailed = true;
logger.error('Failed to get access token, giving up permanently');
stop();
return;
}
await update();
return;
}
if (res.status !== 200) {
logger.error(`Failed to get current song: ${res.status} ${res.statusText}`);
return;
}
try {
let song = res.data.item.name;
let duration = res.data.item.duration_ms;
let artist = res.data.item.artists[0].name;
let time = res.data.progress_ms;
let album = res.data.item.album.name;
let albumImage = res.data.item.album.images[0].url;
clients.forEach(client => {
client.send(JSON.stringify({
song: song,
artist: artist,
time: time,
duration: duration,
album: album,
albumImage: albumImage,
}));
});
} catch (err) {
logger.error(`Failed to parse and send current song: ${err.message}`);
}
}).catch(err => {
if (err.response?.data?.error?.message) {
logger.error(`Failed to get current song: ${err.message}: ${err.response.data.error.message}`);
} else {
logger.error(`Failed to get current song: ${err.message} (${err.response.status} ${err.response.statusText} ${err.response.data.error})`);
}
});
}
export const stop = () => {
clearInterval(interval);
acceptingClients = false;
clients.forEach(client => client.close());
}
}
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