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| import logging | |
| from typing import Dict, Any, Optional | |
| from langchain.chains import ConversationChain | |
| logger = logging.getLogger(__name__) | |
| # In-memory storage for user sessions | |
| user_sessions: Dict[str, Dict[str, Any]] = {} | |
| def initialize_session( | |
| session_id: str, | |
| user_id: str, | |
| collection_name: Optional[str] = None | |
| ) -> None: | |
| """ | |
| Initialize a new chat session | |
| Args: | |
| session_id: Session ID | |
| user_id: User ID | |
| collection_name: Vector store collection name (optional) | |
| """ | |
| logger.info(f"Initializing session {session_id} for user {user_id}") | |
| user_sessions[session_id] = { | |
| "user_id": user_id, | |
| "collection_name": collection_name or "default", | |
| "chat_history": [], | |
| "rag_chain": None | |
| } | |
| def get_session(session_id: str) -> Dict[str, Any]: | |
| """ | |
| Get a session by ID | |
| Args: | |
| session_id: Session ID | |
| Returns: | |
| Dict: Session data | |
| """ | |
| return user_sessions.get(session_id) | |
| def create_rag_chain(session_id: str) -> ConversationChain: | |
| """ | |
| Create a RAG chain for a session | |
| Args: | |
| session_id: Session ID | |
| Returns: | |
| ConversationChain: The created RAG chain | |
| """ | |
| # Implementation for creating RAG chain | |
| # This would be replaced with actual implementation | |
| logger.info(f"Creating RAG chain for session {session_id}") | |
| # Placeholder for RAG chain creation | |
| rag_chain = ConversationChain() | |
| # Store the chain in the session | |
| if session_id in user_sessions: | |
| user_sessions[session_id]["rag_chain"] = rag_chain | |
| return rag_chain | |
| def clear_chat_history(session_id: str) -> None: | |
| """ | |
| Clear chat history for a session | |
| Args: | |
| session_id: Session ID | |
| """ | |
| logger.info(f"Clearing chat history for session {session_id}") | |
| if session_id in user_sessions: | |
| user_sessions[session_id]["chat_history"] = [] | |
| def update_chat_history(session_id: str, user_message: str, ai_message: str) -> None: | |
| """ | |
| Update chat history for a session | |
| Args: | |
| session_id: Session ID | |
| user_message: User message | |
| ai_message: AI response message | |
| """ | |
| if session_id in user_sessions: | |
| user_sessions[session_id]["chat_history"].append({ | |
| "user": user_message, | |
| "ai": ai_message | |
| }) |