refactor: core: Extract PopUpConfirmationView instantiation as a method.

Author: preetmishra

zulipterminal/core.py

@@ -5,7 +5,7 @@
 from collections import OrderedDict
 from functools import partial
 from platform import platform
-from typing import Any, Optional, Tuple
+from typing import Any, Callable, Optional, Tuple
 
 import urwid
 import zulip
@@ -158,6 +158,12 @@ def show_about(self) -> None:
                       server_feature_level=self.model.server_feature_level)
         )
 
+    def show_confirmation_overlay(self, question: Any,
+                                  success_callback: Callable[[], bool],
+                                  ) -> None:
+        self.loop.widget = PopUpConfirmationView(self, question,
+                                                 success_callback)
+
     def search_messages(self, text: str) -> None:
         # Search for a text in messages
         self.model.index['search'].clear()
@@ -181,8 +187,7 @@ def stream_muting_confirmation_popup(self, button: Any) -> None:
                               "center")
         mute_this_stream = partial(self.model.toggle_stream_muted_status,
                                    button.stream_id)
-        self.loop.widget = PopUpConfirmationView(self, question,
-                                                 mute_this_stream)
+        self.show_confirmation_overlay(question, mute_this_stream)
 
     def _narrow_to(self, button: Any, anchor: Optional[int],
                    **narrow: Any) -> None: