refactor: Introduce utility functions for exception handling and database operations; update auth and playlist services to use new exception methods

tests/conftest.py

@@ -18,6 +18,7 @@ from app.models.plan import Plan
 from app.models.user import User
 from app.models.user_oauth import UserOauth  # Ensure model is imported for SQLAlchemy
 from app.utils.auth import JWTUtils, PasswordUtils
+from app.utils.test_helpers import create_access_token_for_user
 
 
 @pytest.fixture(scope="session")
@@ -277,28 +278,14 @@ def test_login_data() -> dict[str, str]:
 @pytest_asyncio.fixture
 async def auth_headers(test_user: User) -> dict[str, str]:
     """Create authentication headers with JWT token."""
-    token_data = {
-        "sub": str(test_user.id),
-        "email": test_user.email,
-        "role": test_user.role,
-    }
-
-    access_token = JWTUtils.create_access_token(token_data)
-
+    access_token = create_access_token_for_user(test_user)
     return {"Authorization": f"Bearer {access_token}"}
 
 
 @pytest_asyncio.fixture
 async def admin_headers(admin_user: User) -> dict[str, str]:
     """Create admin authentication headers with JWT token."""
-    token_data = {
-        "sub": str(admin_user.id),
-        "email": admin_user.email,
-        "role": admin_user.role,
-    }
-
-    access_token = JWTUtils.create_access_token(token_data)
-
+    access_token = create_access_token_for_user(admin_user)
     return {"Authorization": f"Bearer {access_token}"}
 
 
@@ -317,26 +304,12 @@ def authenticated_user(test_user: User) -> User:
 @pytest_asyncio.fixture
 async def auth_cookies(test_user: User) -> dict[str, str]:
     """Create authentication cookies with JWT token."""
-    token_data = {
-        "sub": str(test_user.id),
-        "email": test_user.email,
-        "role": test_user.role,
-    }
-
-    access_token = JWTUtils.create_access_token(token_data)
-
+    access_token = create_access_token_for_user(test_user)
     return {"access_token": access_token}
 
 
 @pytest_asyncio.fixture
 async def admin_cookies(admin_user: User) -> dict[str, str]:
     """Create admin authentication cookies with JWT token."""
-    token_data = {
-        "sub": str(admin_user.id),
-        "email": admin_user.email,
-        "role": admin_user.role,
-    }
-
-    access_token = JWTUtils.create_access_token(token_data)
-
+    access_token = create_access_token_for_user(admin_user)
     return {"access_token": access_token}