[rbdr/map] / Map / Logic / Debouncer.swift

// Copyright (C) 2024 Rubén Beltrán del Río

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program. If not, see https://map.tranquil.systems.
import Foundation

class Debouncer {

  // MARK: - Properties
  private let queue = DispatchQueue.global(qos: .utility)
  private var workItem = DispatchWorkItem(block: {})
  private var interval: TimeInterval

  // MARK: - Initializer
  init(seconds: TimeInterval) {
    self.interval = seconds
  }

  // MARK: - Debouncing function
  func debounce(action: @escaping (() -> Void)) {
    workItem.cancel()
    workItem = DispatchWorkItem(block: { action() })
    queue.asyncAfter(deadline: .now() + interval, execute: workItem)
  }
}