Added Spotify tracking. Fixed filters when none given.

controllers/home.js

@@ -0,0 +1,48 @@
+const axios = require("axios");
+const config = require("../config/configuration");
+const fs = require("fs/promises");
+const logger = require("../services/logging");
+const querystring = require('node:querystring');
+
+function authorizeSpotify(req, res) {
+  res.redirect("https://accounts.spotify.com/authorize?" + querystring.stringify({
+    response_type: "code",
+    client_id: config.spotify.client_id,
+    scope: "user-read-playback-state user-read-currently-playing",
+    redirect_uri: config.spotify.redirect_uri,
+  }));
+}
+
+async function callback(req, res) {
+  const code = req.query.code;
+
+  try {
+    const response = await axios.post("https://accounts.spotify.com/api/token",
+      {
+        code: code,
+        redirect_uri: config.spotify.redirect_uri,
+        grant_type: "authorization_code"
+      },
+      {
+        headers: {
+          "Authorization": "Basic " + new Buffer.from(config.spotify.client_id + ':' + config.spotify.client_secret).toString('base64'),
+          "Content-Type": "application/x-www-form-urlencoded"
+        }
+      }
+    );
+
+    const data = response.data;
+    data["expires_at"] = Date.now() + data["expires_in"] * 1000;
+    await fs.writeFile("credentials.spotify.json", JSON.stringify(data));
+
+    res.redirect("/");
+  } catch (ex) {
+    logger.error(ex, "Failed to get Spotify oauth.");
+    res.send({ 'error': "Something went wrong with spotify's oauth flow" });
+  }
+}
+
+module.exports = {
+  authorizeSpotify,
+  callback
+}