FEAT: NEW WORKFLOW ENGINE (#3160)

Co-authored-by: Joel <iamjoel007@gmail.com>
Co-authored-by: Yeuoly <admin@srmxy.cn>
Co-authored-by: JzoNg <jzongcode@gmail.com>
Co-authored-by: StyleZhang <jasonapring2015@outlook.com>
Co-authored-by: jyong <jyong@dify.ai>
Co-authored-by: nite-knite <nkCoding@gmail.com>
Co-authored-by: jyong <718720800@qq.com>

api/controllers/console/app/wraps.py

@@ -0,0 +1,55 @@
+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.model import App, AppMode
+
+
+def get_app_model(view: Optional[Callable] = None, *,
+                  mode: Union[AppMode, list[AppMode]] = 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 = db.session.query(App).filter(
+                App.id == app_id,
+                App.tenant_id == current_user.current_tenant_id,
+                App.status == 'normal'
+            ).first()
+
+            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)