Move URLs from default section of config to DB

This change moves the callback_url, metadata_url and webhooks_url from
the config to the database. The goal is to move as much as possible from
the config to the DB, in preparation for a potential refactor that will
allow GARM to scale out. This would allow multiple nodes to share a single
source of truth.

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

auth/init_required.go

@@ -51,3 +51,30 @@ func (i *initRequired) Middleware(next http.Handler) http.Handler {
 		next.ServeHTTP(w, r.WithContext(ctx))
 	})
 }
+
+func NewUrlsRequiredMiddleware(store common.Store) (Middleware, error) {
+	return &urlsRequired{
+		store: store,
+	}, nil
+}
+
+type urlsRequired struct {
+	store common.Store
+}
+
+func (u *urlsRequired) Middleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+		ctrlInfo, err := u.store.ControllerInfo()
+		if err != nil || ctrlInfo.WebhookURL == "" || ctrlInfo.MetadataURL == "" || ctrlInfo.CallbackURL == "" {
+			w.Header().Add("Content-Type", "application/json")
+			w.WriteHeader(http.StatusConflict)
+			if err := json.NewEncoder(w).Encode(params.URLsRequired); err != nil {
+				slog.With(slog.Any("error", err)).ErrorContext(ctx, "failed to encode response")
+			}
+			return
+		}
+
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}