feat: fetch app info in plugins (#18202)

api/core/plugin/backwards_invocation/app.py

@@ -2,6 +2,7 @@ from collections.abc import Generator, Mapping
 from typing import Optional, Union
 
 from controllers.service_api.wraps import create_or_update_end_user_for_user_id
+from core.app.app_config.common.parameters_mapping import get_parameters_from_feature_dict
 from core.app.apps.advanced_chat.app_generator import AdvancedChatAppGenerator
 from core.app.apps.agent_chat.app_generator import AgentChatAppGenerator
 from core.app.apps.chat.app_generator import ChatAppGenerator
@@ -15,6 +16,34 @@ from models.model import App, AppMode, EndUser
 
 
 class PluginAppBackwardsInvocation(BaseBackwardsInvocation):
+    @classmethod
+    def fetch_app_info(cls, app_id: str, tenant_id: str) -> Mapping:
+        """
+        Fetch app info
+        """
+        app = cls._get_app(app_id, tenant_id)
+
+        """Retrieve app parameters."""
+        if app.mode in {AppMode.ADVANCED_CHAT.value, AppMode.WORKFLOW.value}:
+            workflow = app.workflow
+            if workflow is None:
+                raise ValueError("unexpected app type")
+
+            features_dict = workflow.features_dict
+            user_input_form = workflow.user_input_form(to_old_structure=True)
+        else:
+            app_model_config = app.app_model_config
+            if app_model_config is None:
+                raise ValueError("unexpected app type")
+
+            features_dict = app_model_config.to_dict()
+
+            user_input_form = features_dict.get("user_input_form", [])
+
+        return {
+            "data": get_parameters_from_feature_dict(features_dict=features_dict, user_input_form=user_input_form),
+        }
+
     @classmethod
     def invoke_app(
         cls,