blueman-sendto: Do not try to send a file during discovery

It looks like there are controllers that cause a fail in that situation, so we need to wait until the discovery is done.

Fixes #463

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## 2-0-stable (unreleased)
+
+### Changes
+
+* Do not try to send a file during a discovery
+
 ## 2.0.3
 
 Fix privilege escalation

apps/blueman-sendto

@@ -25,6 +25,7 @@ from blueman.Constants import *
 import gi
 gi.require_version("Gtk", "3.0")
 from gi.repository import Gtk
+from gi.repository import GLib
 
 from blueman.bluez.Adapter import Adapter
 from blueman.bluez.obex.ObjectPush import ObjectPush
@@ -130,6 +131,15 @@ class Sender(GObject.GObject):
         self.window.show()
 
     def create_session(self):
+        def check():
+            if self.adapter.get_properties()['Discovering']:
+                return True
+            else:
+                self._do_create_session()
+                return False
+        GLib.timeout_add(1000, check)
+
+    def _do_create_session(self):
         dprint("Creating session")
         props = self.adapter.get_properties()
         self.client.create_session(self.device.Address, props["Address"])