Debouncer.swift

import Dispatch

final class Debouncer {
    private var currentWorkItem = DispatchWorkItem(block: {})
    private let interval: TimeInterval
    private let queue: DispatchQueue
    
    init(interval: TimeInterval, queue: DispatchQueue = .main) {
        self.interval = interval
        self.queue = queue
    }
    
    func run(action: @escaping () -> Void) {
        currentWorkItem.cancel()
        currentWorkItem = DispatchWorkItem(block: { action() })
        queue.asyncAfter(deadline: .now() + interval, execute: currentWorkItem)
    }
    
    func cancel() {
        currentWorkItem.cancel()
    }
    
    deinit {
        currentWorkItem.cancel()
    }
}