ticketMan.swift

class TicketMan {
    
    private var ticketStack : Int = 0
    private var ticketCounter : Int = 0
    
    var ticket : Int {
        get {
            ticketStack += 1
            ticketCounter += 1
            return ticketCounter
        }
    }
    
    //you set this as private and call it inside validateTicket()
    func ripTicket(ticket : Int) {
        ticketStack -= 1
        if ticketStack == 0 {
            ticketCounter = 0 //because overflows are a real thing ;)
        }
    }
    
    func validateTicket(ticket: Int) -> Bool {
        if ticket == ticketCounter {
            return true
        } else {
            return false
        }
    }
}