dify/api/controllers/console/app/wraps.py

from collections.abc import Callable
from functools import wraps
from typing import Optional, Union

from controllers.console.app.error import AppNotFoundError
from extensions.ext_database import db
from libs.login import current_user
from models import App, AppMode


def _load_app_model(app_id: str) -> Optional[App]:
    app_model = (
        db.session.query(App)
        .filter(App.id == app_id, App.tenant_id == current_user.current_tenant_id, App.status == "normal")
        .first()
    )
    return app_model


def get_app_model(view: Optional[Callable] = None, *, mode: Union[AppMode, list[AppMode], None] = None):
    def decorator(view_func):
        @wraps(view_func)
        def decorated_view(*args, **kwargs):
            if not kwargs.get("app_id"):
                raise ValueError("missing app_id in path parameters")

            app_id = kwargs.get("app_id")
            app_id = str(app_id)

            del kwargs["app_id"]

            app_model = _load_app_model(app_id)

            if not app_model:
                raise AppNotFoundError()

            app_mode = AppMode.value_of(app_model.mode)
            if app_mode == AppMode.CHANNEL:
                raise AppNotFoundError()

            if mode is not None:
                if isinstance(mode, list):
                    modes = mode
                else:
                    modes = [mode]

                if app_mode not in modes:
                    mode_values = {m.value for m in modes}
                    raise AppNotFoundError(f"App mode is not in the supported list: {mode_values}")

            kwargs["app_model"] = app_model

            return view_func(*args, **kwargs)

        return decorated_view

    if view is None:
        return decorator
    else:
        return decorator(view)