feat: Enhance WebSocket sound playback with credit validation and refactor related methods

app/services/vlc_player.py

@@ -6,6 +6,7 @@ from collections.abc import Callable
 from pathlib import Path
 from typing import Any
 
+from fastapi import HTTPException, status
 from sqlmodel.ext.asyncio.session import AsyncSession
 
 from app.core.logging import get_logger
@@ -14,6 +15,7 @@ from app.models.sound import Sound
 from app.models.sound_played import SoundPlayed
 from app.repositories.sound import SoundRepository
 from app.repositories.user import UserRepository
+from app.services.credit import CreditService, InsufficientCreditsError
 from app.services.socket import socket_manager
 from app.utils.audio import get_sound_file_path
 
@@ -309,7 +311,9 @@ class VLCPlayerService:
             await session.close()
 
     async def play_sound_with_credits(
-        self, sound_id: int, user_id: int
+        self,
+        sound_id: int,
+        user_id: int,
     ) -> dict[str, str | int | bool]:
         """Play sound with VLC with credit validation and deduction.
 
@@ -326,11 +330,8 @@ class VLCPlayerService:
         Raises:
             HTTPException: For various error conditions (sound not found,
                           insufficient credits, VLC failure)
+
         """
-        from fastapi import HTTPException, status
-
-        from app.services.credit import CreditService, InsufficientCreditsError
-
         if not self.db_session_factory:
             raise HTTPException(
                 status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,