add password authentication for bot users

assistant_bot/application.py

@@ -6,12 +6,15 @@ from telegram.ext import (
     CommandHandler,
     InlineQueryHandler,
     MessageHandler,
+    TypeHandler,
     filters,
 )
 
 from .ai import AIClient
+from .auth import authentication_guard
 from .config import (
     get_assistant_mode,
+    get_assistant_password,
     get_bot_token,
     get_db_path,
     get_local_timezone,
@@ -53,6 +56,7 @@ def configure_logging() -> None:
 
 
 def create_application() -> Application:
+    assistant_password = get_assistant_password()
     storage = AssistantStorage(get_db_path())
     mode = get_assistant_mode()
     application = (
@@ -63,6 +67,7 @@ def create_application() -> Application:
         .build()
     )
     application.bot_data["storage"] = storage
+    application.bot_data["assistant_password"] = assistant_password
     ai_client: AIClient
     speech_recognizer: SpeechTranscriber
     if mode == "local":
@@ -88,6 +93,7 @@ def create_application() -> Application:
     application.bot_data["speech_recognizer"] = speech_recognizer
     application.bot_data["voice_max_duration"] = get_voice_max_duration_seconds()
 
+    application.add_handler(TypeHandler(Update, authentication_guard), group=-1)
     application.add_handler(CommandHandler("start", start))
     application.add_handler(CommandHandler("help", help_command))
     application.add_handler(CommandHandler("ask", ask_command))