Throttler.swift

class Throttler {
    private let delay: DispatchTimeInterval
    private let queue: DispatchQueue
    private var previousFiredTime: DispatchTime = .now()
    
    init(delay: DispatchTimeInterval, queue: DispatchQueue = .main) {
        self.delay = delay
        self.queue = queue
    }
    
    func throttle(_ block: @escaping () -> Void) -> Void {
        queue.asyncAfter(deadline: .now() + delay) { [weak self, delay] in
            guard let self = self else { return }
            
            let minimumDelay = self.previousFiredTime + delay
            
            if .now() < minimumDelay { return }
            self.previousFiredTime = .now()
            block()
        }
    }
}