verify: Fix verify script to work correctly

The verify script would start an async routine. However, this blocks the
dbus return, which really is needed.

Also, we should only return one item of the script for each VerifyStart
run. So, fix things by pop'ing the first item and putting it on the bus
from a GLib.add_timeout handler.

tests/dbusmock/fprintd.py

@@ -18,6 +18,7 @@ __email__ = 'hadess@hadess.net'
 __copyright__ = '(c) 2020 Red Hat Inc.'
 __license__ = 'LGPL 3+'
 
+from gi.repository import GLib
 import dbus
 import asyncio
 
@@ -213,13 +214,9 @@ def can_verify_finger(device, finger_name):
         return True
     return False
 
-async def send_verify_script(device, script):
-    for [result, done, timeout] in device.verify_script:
-        await asyncio.sleep(timeout)
-        device.EmitSignal(DEVICE_IFACE, 'VerifyStatus', 'sb', [
-                            result,
-                            done
-                          ])
+def device_emit_signal(device, *args):
+    print("emitting signal", *args)
+    device.EmitSignal(*args)
 
 @dbus.service.method(DEVICE_IFACE,
                      in_signature='s', out_signature='')
@@ -249,13 +246,21 @@ def VerifyStart(device, finger_name):
     if finger_name == 'any' and not device.has_identification:
         finger_name = device.fingers[device.claimed_user][0]
     device.selected_finger = finger_name
-    device.EmitSignal(DEVICE_IFACE, 'VerifyFingerSelected', 's', [
-                          finger_name
+    # Needs to happen after method return
+    GLib.idle_add(device.EmitSignal,
+                  DEVICE_IFACE, 'VerifyFingerSelected', 's', [
+                    device.selected_finger
                   ])
 
     if device.verify_script is not None and len(device.verify_script) > 0:
-        asyncio.run(send_verify_script(device, device.verify_script))
-
+        result, done, timeout = device.verify_script.pop(0)
+        GLib.timeout_add(timeout,
+                         device_emit_signal,
+                         device,
+                         DEVICE_IFACE, 'VerifyStatus', 'sb', [
+                           result,
+                           done
+                         ])
 
 @dbus.service.method(DEVICE_MOCK_IFACE,
                      in_signature='sb', out_signature='')