I have developed a model using express. While setting this in one function, it returns null in another function, forcing me to use return. What is the proper method to handle this situation?
const Seat = function(seat) {
this.seat = seat.seat;
this.seatNumber = seat.seatNumber;
this.price = seat.price;
this.available = seat.available;
this.disabilityAccessible = seat.disabilityAccessible;
};
Seat.findSeat = (key, value) => {
this.seat = file.find(obj => obj[key] === value);
return this.seat;
};
Seat.bookSeat = function(seatNumber, result) {
this.seat = this.findSeat('seatNumber', seatNumber);
if (this.seat === undefined || Object.keys(this.seat).length === 0) {
result({ error: true, message: "Seat not found" });
}
if(!this.seat.available){
result({ error: true, message: "Seat unavailable for booking" });
}
const newSeatData = file.map(row => {
if (row.seatNumber === seatNumber) {
row.available = false;
this.seat = row;
}
return row;
});
fs.writeFileSync("./model/seatData.json", JSON.stringify(newSeatData,null,2), "utf-8", function(err) {
if (err) {
result({ error: true, message: "Failed to update booking" });
}
});
result(null, this.seat);
};
module.exports = Seat;