83 lines
2.3 KiB
JavaScript
83 lines
2.3 KiB
JavaScript
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const axios = require("axios");
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const logger = require("./logging");
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const fs = require("fs/promises");
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const Song = require("../../models/song");
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class SpotifyTracker {
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constructor(config, token) {
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this._token = token;
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this._cache = null;
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this._config = config;
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this._auth = new Buffer.from(config.client_id + ':' + config.client_secret).toString('base64');
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}
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async poll(useCache = false) {
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if (token == null)
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return null;
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if (useCache)
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return cache;
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if (token.expires_at < Date.now() + 300)
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await this.#refreshTokenIfNeeded();
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try {
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const response = await axios.get("https://api.spotify.com/v1/me/player/currently-playing",
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{
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headers: {
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"Authorization": "Bearer " + token["access_token"]
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}
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}
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);
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if (!response.data) {
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cache = null;
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return null;
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}
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cache = [this.#transform(response.data)];
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return cache;
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} catch (ex) {
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logger.error(ex, "Failed to get currently playing data from Spotify.");
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return [];
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}
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}
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#transform(data) {
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const item = data.item;
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const artists = item.artists.map(a => a.name);
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const year = null;
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const state = data.is_playing ? "playing" : "paused";
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return new Song(item.id, item.name, item.album.name, artists, year, item.duration_ms, data.progress_ms, "spotify", state, "spotify");
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}
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async #refreshTokenIfNeeded() {
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if (!this._token || this._token.expires_at && this._token.expires_at - Date.now() > 900)
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return false;
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const response = await axios.post("https://accounts.spotify.com/api/token",
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{
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client_id: this._config.client_id,
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refresh_token: this._token.refresh_token,
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grant_type: "refresh_token"
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},
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{
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headers: {
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"Authorization": "Basic " + this._auth,
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"Content-Type": "application/x-www-form-urlencoded"
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}
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}
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);
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const data = response.data;
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data["expires_at"] = Date.now() + data["expires_in"] * 1000;
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if (!data["refresh_token"])
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data["refresh_token"] = this._token.refresh_token;
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this._token = data;
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await fs.writeFile("credentials.spotify.json", JSON.stringify(data));
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logger.debug("Updated access token for Spotify.");
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return true;
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}
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}
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module.exports = SpotifyTracker;
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