Add API route for Spotify

pages/api/Spotify.js

@@ -0,0 +1,58 @@
+import querystring from 'querystring';
+
+const {
+  SPOTIFY_CLIENT_ID: client_id,
+  SPOTIFY_CLIENT_SECRET: client_secret,
+  SPOTIFY_REFRESH_TOKEN: refresh_token,
+} = process.env;
+
+const basic = Buffer.from(`${client_id}:${client_secret}`).toString('base64');
+const NOW_PLAYING_ENDPOINT = `https://api.spotify.com/v1/me/player/currently-playing`;
+const TOKEN_ENDPOINT = `https://accounts.spotify.com/api/token`;
+
+const getAccessToken = async () => {
+  const response = await fetch(TOKEN_ENDPOINT, {
+    method: 'POST',
+    headers: {
+      Authorization: `Basic ${basic}`,
+      'Content-Type': 'application/x-www-form-urlencoded',
+    },
+    body: querystring.stringify({
+      grant_type: 'refresh_token',
+      refresh_token,
+    }),
+  });
+
+  return response.json();
+};
+
+export const getNowPlaying = async () => {
+  const { access_token } = await getAccessToken();
+
+  return fetch(NOW_PLAYING_ENDPOINT, {
+    headers: {
+      Authorization: `Bearer ${access_token}`,
+    },
+  });
+};
+
+export default async (_, res) => {
+  const response = await getNowPlaying();
+
+  if (response.status === 204 || response.status > 400) {
+    return res.status(200).json({ isPlaying: false });
+  }
+
+  const song = await response.json();
+  const isPlaying = song.is_playing;
+  const title = song.item.name;
+  const artist = song.item.artists.map((_artist) => _artist.name).join(', ');
+  const album = song.item.album.name;
+
+  return res.status(200).json({
+    album,
+    artist,
+    isPlaying,
+    title,
+  });
+};