User: Task: "Create Handle Recurring Bookings Api"
    Description: "Generate a Node.js Handle Recurring Bookings Api with given dependenceis"
    Requirements:
    - Database: mongoose
    - Authentication: None specified
    - Output needed: Return only the function code as specified in dependencies
    - Dependencies: Create a function to manage recurring bookings. Export: exports.createRecurringBooking = async () => {...}, 
Accept parameters: startDate, endDate, frequency (e.g., weekly, monthly), roomId., 
Validate required fields: Ensure startDate, endDate, frequency, and roomId are provided., 
Use a scheduling library (e.g., node-cron) to generate recurring booking dates based on the frequency., 
Check availability for each recurring date using the checkAvailability function., 
Create bookings for each recurring date and link them to the same user or service., 
Respond with a success message containing the booking details for each occurrence., 
Handle errors like conflicting bookings, invalid parameters, or database issues.
    - Previous Code 
const mongoose = require('mongoose');
const Booking = require('./models/Booking'); // Assume there is a Booking model defined in models/Booking.js

/**
 * Check availability for a booking based on the provided dates and roomId.
 * 
 * @param {Date} checkInDate - The starting date for the booking.
 * @param {Date} checkOutDate - The ending date for the booking.
 * @param {String} roomId - The unique identifier for the room/service.
 * 
 * @returns {Object} - An object containing the availability status and a message.
 */
exports.checkAvailability = async (checkInDate, checkOutDate, roomId) => {
    try {
        // Validate required fields
        if (!checkInDate || !checkOutDate || !roomId) {
            throw new Error('Missing required fields: checkInDate, checkOutDate, and roomId are required');
        }

        // Ensure that checkInDate and checkOutDate are valid dates
        const checkIn = new Date(checkInDate);
        const checkOut = new Date(checkOutDate);
        if (isNaN(checkIn) || isNaN(checkOut)) {
            throw new Error('Invalid date format. Please provide valid checkInDate and checkOutDate.');
        }

        // Query the Booking model to find any conflicting bookings
        const existingBookings = await Booking.find({
            roomId: roomId,
            $or: [
                { checkInDate: { $lt: checkOut }, checkOutDate: { $gt: checkIn } }
            ]
        });

        if (existingBookings.length > 0) {
            // If conflicts exist, room/service is unavailable
            return {
                available: false,
                message: 'Room/Service is unavailable for the selected dates.'
            };
        }

        // If no conflicts exist, room/service is available
        return {
            available: true,
            message: 'Room/Service is available for the selected dates.'
        };
    } catch (error) {
        // Handle errors and provide feedback
        return {
            available: false,
            message: `Error checking availability: ${error.message}`
        };
    }
};

/**
 * Manage time slots for a specific date and service.
 * 
 * @param {String} date - The specific date for time slots.
 * @param {String} serviceId - The unique identifier for the service.
 * @param {Array} availableSlots - An array of proposed time slots.
 * 
 * @returns {Object} - An object containing the success message or errors encountered.
 */
exports.manageTimeSlots = async (date, serviceId, availableSlots) => {
    try {
        // Validate required fields
        if (!date || !serviceId || !Array.isArray(availableSlots)) {
            throw new Error('Missing required fields: date, serviceId, and availableSlots must be provided.');
        }

        // Ensure the date is a valid date
        const specificDate = new Date(date);
        if (isNaN(specificDate)) {
            throw new Error('Invalid date format. Please provide a valid date.');
        }

        // Check for overlapping time slots with existing bookings
        const overlappingBookings = await Booking.find({
            serviceId: serviceId,
            date: specificDate,
            timeSlot: { $in: availableSlots }
        });

        if (overlappingBookings.length > 0) {
            throw new Error('Some of the time slots overlap with existing bookings.');
        }
        
        // Use TimeSlot model to create or update available time slots
        await TimeSlot.updateOne(
            { date: specificDate, serviceId: serviceId },
            { $set: { availableSlots: availableSlots } },
            { upsert: true }
        );

        // Respond with a success message indicating available time slots
        return {
            success: true,
            message: 'Time slots successfully managed for the specified date and service.'
        };
    } catch (error) {
        // Handle errors and provide feedback
        return {
            success: false,
            message: `Error managing time slots: ${error.message}`
        };
    }
};

    - Supporting data 
    - Updating File undefined
    
    Please generate the code for this task, following the instructions and including comments for clarity.
    While creating router for specifict file your have to read supporing file data and create for that 

    **Output Formats**: 

Return dependencies like this `const bcrypt = require('bcrypt');`  in this formate
```dependencies
const bcrypt = require('bcrypt');
```

Ensure this format is consistently followed in responses.
    
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