src/nodes/basic_chatbot.py

from src.state.state import State
from langchain_core.messages import HumanMessage, AIMessage

class BasicChatbot:
    """
    Class to handle the basic chatbot functionality with memory.
    """

    def __init__(self, model, session_id: str = "default"):
        """
        Initialize the BasicChatbot with the given model and memory.
        
        :param model: The LLM to be used for the chatbot (already memory-enabled).
        :param session_id: Session ID for conversation memory
        """
        self.model = model
        self.session_id = session_id
        # Memory config for the model
        self.memory_config = {"configurable": {"session_id": session_id}}

    def process(self, state):
        """
        Process the state to generate a response from the model with memory.
        
        :param state: The current state of the chatbot.
        :return: The response generated by the model.
        """
        
        # Get the messages from the state
        messages = state['messages']
        if not messages:
            return state
        
        # Use the memory-enabled model with session config
        response = self.model.invoke(messages, config=self.memory_config)
        
        return {'messages': response}