Added chat history and chat item

private_gpt/users/crud/chat_crud.py

@@ -0,0 +1,21 @@
+from typing import Optional, List, Union, Dict, Any
+from fastapi import HTTPException, status
+from sqlalchemy.orm import Session
+from sqlalchemy.exc import IntegrityError
+
+from private_gpt.users.crud.base import CRUDBase
+from private_gpt.users.models.chat import ChatHistory, ChatItem
+from private_gpt.users.schemas.chat import ChatHistoryCreate, ChatHistoryCreate, ChatItemCreate, ChatItemUpdate
+
+
+class CRUDChat(CRUDBase[ChatHistory, ChatHistoryCreate, ChatHistoryCreate]):
+    def get_by_id(self, db: Session, *, id: int) -> Optional[ChatHistory]:
+        return db.query(self.model).filter(ChatHistory.conversation_id == id).first()
+
+
+class CRUDChatItem(CRUDBase[ChatItem, ChatItemCreate, ChatItemUpdate]):
+    pass
+
+
+chat = CRUDChat(ChatHistory)
+chat_item = CRUDChatItem(ChatItem)