Resolves #18536 Retreive conversation variables (#18581)

api/controllers/service_api/app/conversation.py

@@ -14,6 +14,9 @@ from fields.conversation_fields import (
     conversation_infinite_scroll_pagination_fields,
     simple_conversation_fields,
 )
+from fields.conversation_variable_fields import (
+    conversation_variable_infinite_scroll_pagination_fields,
+)
 from libs.helper import uuid_value
 from models.model import App, AppMode, EndUser
 from services.conversation_service import ConversationService
@@ -93,6 +96,31 @@ class ConversationRenameApi(Resource):
             raise NotFound("Conversation Not Exists.")
 
 
+class ConversationVariablesApi(Resource):
+    @validate_app_token(fetch_user_arg=FetchUserArg(fetch_from=WhereisUserArg.QUERY))
+    @marshal_with(conversation_variable_infinite_scroll_pagination_fields)
+    def get(self, app_model: App, end_user: EndUser, c_id):
+        # conversational variable only for chat app
+        app_mode = AppMode.value_of(app_model.mode)
+        if app_mode not in {AppMode.CHAT, AppMode.AGENT_CHAT, AppMode.ADVANCED_CHAT}:
+            raise NotChatAppError()
+
+        conversation_id = str(c_id)
+
+        parser = reqparse.RequestParser()
+        parser.add_argument("last_id", type=uuid_value, location="args")
+        parser.add_argument("limit", type=int_range(1, 100), required=False, default=20, location="args")
+        args = parser.parse_args()
+
+        try:
+            return ConversationService.get_conversational_variable(
+                app_model, conversation_id, end_user, args["limit"], args["last_id"]
+            )
+        except services.errors.conversation.ConversationNotExistsError:
+            raise NotFound("Conversation Not Exists.")
+
+
 api.add_resource(ConversationRenameApi, "/conversations/<uuid:c_id>/name", endpoint="conversation_name")
 api.add_resource(ConversationApi, "/conversations")
 api.add_resource(ConversationDetailApi, "/conversations/<uuid:c_id>", endpoint="conversation_detail")
+api.add_resource(ConversationVariablesApi, "/conversations/<uuid:c_id>/variables", endpoint="conversation_variables")