orchestration_agent/agent.py

from langgraph.graph import StateGraph, MessagesState, START, END
from langgraph.checkpoint.memory import MemorySaver
from .utils.nodes import tool_return_node, extract_user_reference_node
from utils.models_loader import llm_gpt
from .utils.state import ValidationFormatter
from .utils.utils import caption_image , extract_latest_response_block
from .utils.tools import retrieve_data_for_orchestration

import re
from langchain_core.messages import SystemMessage
memory = MemorySaver()


def orchestration_graph():
    workflow = StateGraph(MessagesState)
    workflow.add_node("chatbot1", tool_return_node)
    workflow.add_node("chatbot2", extract_user_reference_node)

    workflow.add_edge(START, "chatbot1")
    workflow.add_edge('chatbot1', "chatbot2")
    workflow.add_edge('chatbot2', END)
    return workflow.compile(checkpointer=memory)

user_input_history = []
def orchestration_chat(user_input: str, image_base64=[]):
    global user_input_history
    user_input_history.append({'role': 'human', 'content': user_input})

    if len(image_base64)>0:
        caption_response = caption_image(image_base64, user_input)
        user_input_history.append({'role': 'image_caption', 'content': caption_response})

        print('Caption Response:', caption_response)
    else:
        caption_response =''
    if len(user_input_history)>4:
        user_input_history=user_input_history[-2:]
    print('Length of history', len(user_input_history))
    query_for_retrieval = ' '.join(
    [msg['content'] for msg in user_input_history if msg['role'] in ('human', 'image_caption')]
    )

    influencers_data = retrieve_data_for_orchestration(query_for_retrieval)

    agent = orchestration_graph()
    config = {"configurable": {"thread_id": "orchestration-thread"}}
    response = agent.invoke({"messages": [{'role':'human','content':user_input},
                                          {'role': 'function', 'name': 'data_of_influencers', 'content': influencers_data},
                                          {'role':'function','name':'information_of_image','content':caption_response}]}, config)['messages']
    print('Orchestrator Response', response)
    response=llm_gpt.with_structured_output(ValidationFormatter).invoke(extract_latest_response_block(response))
    return response