package host.exp.exponent.utils

/**
 * This class is giving appropriate activity IDs based on the type of the activity.
 * We have three types of Expo activities:
 * 1. Kernel activity - this is always with activity ID = -1.
 * 2. App activities - their IDs grow up starting from 0 as the kernel activity is initialized first.
 * 3. Headless activities - IDs are decreasing starting from -2.
 * */
object ExpoActivityIds {
  private var currentAppActivityId = 0
  private var currentHeadlessActivityId = -2

  fun getNextAppActivityId(): Int = currentAppActivityId++
  fun getNextHeadlessActivityId(): Int = currentHeadlessActivityId--
}