Give the dashboard a way to check backgroundImage availability

src/routes/profile.js

@@ -39,10 +39,14 @@ async function authorize(req, res, next) {
 async function get(req, res, next) {
     assert.strictEqual(typeof req.user, 'object');
 
-    const [error, avatarUrl] = await safe(users.getAvatarUrl(req.user));
+    let [error, avatarUrl] = await safe(users.getAvatarUrl(req.user));
     if (error) return next(BoxError.toHttpError(error));
     if (!avatarUrl) return next(new HttpError(404, 'User not found'));
 
+    let backgroundImage;
+    [error, backgroundImage] = await safe(users.getBackgroundImage(req.user.id));
+    if (error) return next(BoxError.toHttpError(error));
+
     next(new HttpSuccess(200, {
         id: req.user.id,
         username: req.user.username,
@@ -52,6 +56,7 @@ async function get(req, res, next) {
         twoFactorAuthenticationEnabled: req.user.twoFactorAuthenticationEnabled,
         role: req.user.role,
         source: req.user.source,
+        hasBackgroundImage: !!backgroundImage,
         avatarUrl
     }));
 }