grants handler wiring (#744)

controller/grants.go

@@ -0,0 +1,22 @@
+package controller
+
+import (
+	"github.com/go-openapi/runtime/middleware"
+	"github.com/openziti/zrok/rest_model_zrok"
+	"github.com/openziti/zrok/rest_server_zrok/operations/admin"
+	"github.com/sirupsen/logrus"
+)
+
+type grantsHandler struct{}
+
+func newGrantsHandler() *grantsHandler {
+	return &grantsHandler{}
+}
+
+func (h *grantsHandler) Handle(params admin.GrantsParams, principal *rest_model_zrok.Principal) middleware.Responder {
+	if !principal.Admin {
+		logrus.Errorf("invalid admin principal")
+		return admin.NewGrantsUnauthorized()
+	}
+	return admin.NewGrantsOK()
+}