Notification in run: Preparing for automation, please wait (#948)

Co-authored-by: Rick Elrod <rick@elrod.me>

docs/changelog-fragments.d/948.feature.md

@@ -0,0 +1 @@
+Added state notification when running a playbook during initialization. -- by {user}`cidrblock`

src/ansible_navigator/actions/run.py

@@ -30,6 +30,7 @@
 from ..ui_framework import Interaction
 from ..ui_framework import dict_to_form
 from ..ui_framework import form_to_dict
+from ..ui_framework import nonblocking_notification
 from ..ui_framework import warning_notification
 from ..utils import abs_user_path
 from ..utils import human_time
@@ -204,6 +205,8 @@ def __init__(self, args: ApplicationConfiguration):
         self.runner: CommandAsync
         self._runner_finished: bool
         self._auto_scroll = False
+        #: Flag when the first message is received from runner
+        self._first_message_received: bool = False
 
         self._plays = Step(
             name="plays",
@@ -279,6 +282,14 @@ def run(self, interaction: Interaction, app: AppPublic) -> Union[Interaction, No
 
         self.steps.append(self._plays)
 
+        # Show a notification until the first the first message from the queue is processed
+        if self._subaction_type == "run":
+            messages = ["Preparing for automation, please wait..."]
+            notification = nonblocking_notification(messages=messages)
+            interaction.ui.show(notification)
+            while not self._first_message_received:
+                self.update()
+
         while True:
             self.update()
 
@@ -603,6 +614,8 @@ def _dequeue(self) -> None:
         """Drain the runner queue"""
         drain_count = 0
         while not self._queue.empty():
+            if not self._first_message_received:
+                self._first_message_received = True
             message = self._queue.get()
             self._handle_message(message)
             drain_count += 1