Spaces:
Running
Running
File size: 3,539 Bytes
7b7cab6 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 |
import uuid
from pymongo import MongoClient
from langchain_mongodb.chat_message_histories import MongoDBChatMessageHistory
class ChatManagement:
def __init__(self, cluster_url, database_name, collection_name):
"""
Initializes the ChatManagement class with MongoDB connection details.
Args:
cluster_url (str): MongoDB cluster URL.
database_name (str): Name of the database.
collection_name (str): Name of the collection.
"""
self.connection_string = cluster_url
self.database_name = database_name
self.collection_name = collection_name
self.chat_sessions = {} # Dictionary to store chat history objects for each session
def create_new_chat(self):
"""
Creates a new chat session by initializing a MongoDBChatMessageHistory object.
Returns:
str: The unique chat ID.
"""
# Generate a unique chat ID
chat_id = str(uuid.uuid4())
# Initialize MongoDBChatMessageHistory for the chat session
chat_message_history = MongoDBChatMessageHistory(
session_id=chat_id,
connection_string=self.connection_string,
database_name=self.database_name,
collection_name=self.collection_name,
)
# Store the chat_message_history object in the session dictionary
self.chat_sessions[chat_id] = chat_message_history
return chat_id
def get_chat_history(self, chat_id):
"""
Retrieves the MongoDBChatMessageHistory object for a given chat session by its chat ID.
Args:
chat_id (str): The unique ID of the chat session.
Returns:
MongoDBChatMessageHistory or None: The chat history object of the chat session, or None if not found.
"""
# Check if the chat session is already in memory
if chat_id in self.chat_sessions:
return self.chat_sessions[chat_id]
# If not in memory, try to fetch from the database
chat_message_history = MongoDBChatMessageHistory(
session_id=chat_id,
connection_string=self.connection_string,
database_name=self.database_name,
collection_name=self.collection_name,
)
if chat_message_history.messages: # Check if the session exists in the database
self.chat_sessions[chat_id] = chat_message_history
return chat_message_history
return None # Chat session not found
def initialize_chat_history(self, chat_id):
"""
Initializes a new chat history for the given chat ID if it does not already exist.
Args:
chat_id (str): The unique ID of the chat session.
Returns:
MongoDBChatMessageHistory: The initialized chat history object.
"""
# If the chat history already exists, return it
if chat_id in self.chat_sessions:
return self.chat_sessions[chat_id]
# Otherwise, create a new chat history
chat_message_history = MongoDBChatMessageHistory(
session_id=chat_id,
connection_string=self.connection_string,
database_name=self.database_name,
collection_name=self.collection_name,
)
# Save the new chat session to the session dictionary
self.chat_sessions[chat_id] = chat_message_history
return chat_message_history
|