Filter data in Node.js - node.js

Question

I want to subtract already booked data from totalSpots variable whenever this condition returns true
if(totalSpots > bookings.count()){
return true
}
return false
And when it return true I want to store it into a variable called filteredData.
GET route to fetch parking availability:
exports.getParkingListByCriteria = async (req, res) => {
try {
endTime = getEndTime(req.body.startTime, req.body.duration);
let parkings = await Parking.find(
{
"location.city": req.body.city,
}
);
let parkingList = [];
let parkingIds = [];
parkings.forEach((parking) => {
isParkingAvailable(parking.availability, req.body.startTime, endTime);
{
parkingList.push(parking);
parkingIds.push(parking._id);
}
});
const bookings = await Booking.find({
"isBookingCancelled.value": false,
parkingId: { $in: parkingIds },
});
let groupBookings = {};
let tmppid = "";
bookings.forEach((booking) => {
tmppid = booking.parkingId.toString();
if (typeof groupBookings[tmppid] === "undefined")
groupBookings[tmppid] = [];
groupBookings[tmppid].push(booking);
});
var keys = Object.keys(groupBookings);
console.log("parkingList -> ", parkingList);
parkingList.filter((booking) => {
isParkingSlotAvailable(groupBookings, Object.keys(groupBookings));
}); //Stuck in the function
res.status(200).send(parkingList);
} catch (error) {
return res.status(500).json({ error: error.message });
}
};
isParkingSlotAvailable Function:
exports.isParkingSlotAvailable = (groupBookings, keys) => {
groupBookings.forEach((booking) => {});
};
The sample data from console.log(parkingList)
parkingList -> [
{
contactInfo: { name: 'Claudia Shields', phoneNumber: 8904672101 },
location: {
address: '737 applegate court',
city: 'bowie',
state: 'rhode island',
country: 'greece',
zipCode: 10825
},
coordinates: { lng: 34.048954, lat: 10.299556 },
_id: new ObjectId("62d12053cb03235286511d54"),
merchantId: new ObjectId("62c950dfc96c2b690028be88"),
price: 16,
parkingType: 'residence',
parkingInfo: [ [Object] ],
totalSpots: [ 127 ],
status: 'active',
isFeePaid: false,
parkingZone: [],
availability: [ [Object], [Object], [Object], [Object], [Object], [Object] ],
specialEvents: [],
createdAt: 2022-07-15T08:07:47.997Z,
updatedAt: 2022-07-15T09:29:58.696Z,
__v: 0
},
]
The sample data from console.log(groupBookings)
groupBookings: {
'62d12053cb03235286511d54': [
{
duration: [Object],
isBookingCancelled: [Object],
_id: new ObjectId("62d2a9d1cf93195bef1923af"),
parkingId: new ObjectId("62d12053cb03235286511d54"),
user: new ObjectId("62c95116c96c2b690028be8e"),
date: 2022-07-22T00:00:00.000Z,
startTime: 2022-07-22T05:30:00.000Z,
endTime: 2022-07-22T08:40:00.000Z,
isFeePaid: false,
status: 'sent',
isStarted: false,
isEnabled: false,
createdAt: 2022-07-16T12:06:42.002Z,
updatedAt: 2022-07-16T12:15:08.578Z,
__v: 0
},
{
duration: [Object],
isBookingCancelled: [Object],
_id: new ObjectId("62d553f80e8fa13f1295514c"),
parkingId: new ObjectId("62d12053cb03235286511d54"),
user: new ObjectId("62c95136c96c2b690028be9a"),
date: 2022-07-22T00:00:00.000Z,
startTime: 2022-07-22T10:30:00.000Z,
endTime: 2022-07-22T12:30:00.000Z,
isFeePaid: false,
status: 'sent',
isStarted: false,
isEnabled: false,
createdAt: 2022-07-18T12:37:12.682Z,
updatedAt: 2022-07-18T12:37:12.682Z,
__v: 0
}
]
}

Answer 1

Try to change your filter function like this.
Also, make sure that you update the parkingList since filter does not edit the array in-place.
parkingList = parkingList.filter((booking) => {
const booked = groupBookings[booking._id];
const alreadyBooked = booked ? booked.length : 0;
return booking.totalSpots[0] > alreadyBooked;
});