ui/curses: add curses interface draft

pqcli/ui/curses/views/confirm_view.py

@@ -0,0 +1,48 @@
+import typing as T
+
+from ..event_handler import EventHandler
+from ..util import Choice
+from ..widgets import Menu
+from .base_view import BaseView
+
+
+class ConfirmView(BaseView):
+    def __init__(self, screen: T.Any, title: str) -> None:
+        super().__init__(screen)
+
+        self.title = f"{title}:"
+        self.on_cancel = EventHandler()
+        self.on_confirm = EventHandler()
+
+        self.choices: T.List[Choice] = [
+            Choice(
+                keys=list(map(ord, "yY")),
+                desc=f"[y] Yes",
+                callback=self.on_confirm,
+            ),
+            Choice(
+                keys=list(map(ord, "nNqQ\N{ESC}")),
+                desc="[N] No",
+                callback=self.on_cancel,
+            ),
+        ]
+
+    def start(self) -> None:
+        scr_height, scr_width = self.screen.getmaxyx()
+        self.screen.erase()
+        self.screen.refresh()
+
+        self.main_menu = Menu(
+            header=self.title,
+            choices=self.choices,
+            scr_height=scr_height,
+            scr_width=scr_width,
+        )
+        self.main_menu.render()
+
+    def stop(self) -> None:
+        self.main_menu.stop()
+
+    def keypress(self, key: int) -> None:
+        self.main_menu.keypress(key)
+        self.main_menu.render()