refactor: The first refactored version for sdk release (#907)

Co-authored-by: chengfangyin2 <chengfangyin3@jd.com>

dbgpt/app/scene/chat_knowledge/refine_summary/chat.py

@@ -0,0 +1,33 @@
+from typing import Dict
+
+from dbgpt.app.scene import BaseChat, ChatScene
+
+
+class ExtractRefineSummary(BaseChat):
+    chat_scene: str = ChatScene.ExtractRefineSummary.value()
+
+    """extract final summary by llm"""
+
+    def __init__(self, chat_param: Dict):
+        """ """
+        chat_param["chat_mode"] = ChatScene.ExtractRefineSummary
+        super().__init__(
+            chat_param=chat_param,
+        )
+
+        self.existing_answer = chat_param["select_param"]
+
+    async def generate_input_values(self):
+        input_values = {
+            # "context": self.user_input,
+            "existing_answer": self.existing_answer,
+        }
+        return input_values
+
+    def stream_plugin_call(self, text):
+        """return summary label"""
+        return f"<summary>{text}</summary>"
+
+    @property
+    def chat_type(self) -> str:
+        return ChatScene.ExtractRefineSummary.value