feat: add refresh token for spotify

packages/backend/src/apps/spotify/auth/refresh-token.ts

@@ -0,0 +1,30 @@
+import { IGlobalVariable } from '@automatisch/types';
+import qs from 'qs';
+
+const refreshToken = async ($: IGlobalVariable) => {
+  const stringifiedBody = qs.stringify({
+    refresh_token: $.auth.data.refreshToken as string,
+    grant_type: 'refresh_token',
+  });
+
+  const headers = {
+    Authorization: `Basic ${Buffer.from(
+      $.auth.data.clientId + ':' + $.auth.data.clientSecret
+    ).toString('base64')}`,
+    'Content-Type': 'application/x-www-form-urlencoded',
+  };
+
+  const response = await $.http.post(
+    'https://accounts.spotify.com/api/token',
+    stringifiedBody,
+    { headers }
+  );
+
+  await $.auth.set({
+    accessToken: response.data.access_token,
+    expiresIn: response.data.expires_in,
+    tokenType: response.data.token_type,
+  });
+};
+
+export default refreshToken;