chatLogger.ts

import fs from 'fs-extra';
import path from 'path';

interface ChatHistory {
  timestamp: string;
  question: string;
  answer: string;
}

const ensureLogDirectory = (logDirectory: string): void => {
  fs.ensureDirSync(logDirectory);
};

const getLogFilename = (): string => {
  const currentDate = new Date();
  const year = currentDate.getFullYear();
  const month = String(currentDate.getMonth() + 1).padStart(2, '0');
  const day = String(currentDate.getDate()).padStart(2, '0');

  return `${year}-${month}-${day}.json`;
};

const logChat = async (logDirectory: string, question: string, answer: string): Promise<void> => {
  const timestamp = new Date().toISOString();
  const chatHistory: ChatHistory = { timestamp, question, answer };
  const logFilename = getLogFilename();
  const logFilePath = path.join(logDirectory, logFilename);

  ensureLogDirectory(logDirectory);

  if (!fs.existsSync(logFilePath)) {
    await fs.writeJson(logFilePath, [chatHistory]);
  } else {
    const chatHistoryArray = await fs.readJson(logFilePath);
    chatHistoryArray.push(chatHistory);
    await fs.writeJson(logFilePath, chatHistoryArray);
  }
};

export default logChat;