NavigationExtensions

NavigationExtensions.kt

	private fun View.goTo(
		@IdRes id: Int, bundle: Bundle? = null, navOptions: NavOptions? = null,
		navigatorExtras: Navigator.Extras? = null
	) {
		if (mayNavigate(id)) findNavController().navigate(id, bundle, navOptions, navigatorExtras)
	}

	private fun Fragment.goTo(
		@IdRes id: Int, bundle: Bundle? = null, navOptions: NavOptions? = null,
		navigatorExtras: Navigator.Extras? = null
	) {
		if (mayNavigate(id)) findNavController().navigate(id, bundle, navOptions, navigatorExtras)
	}

	private fun Fragment.mayNavigate(@IdRes id: Int): Boolean {
		val navController = this.findNavController()
		val destinationIdInNavController = navController.currentDestination?.id
		val destinationIdOfThisFragment = view?.getTag(id) ?: destinationIdInNavController

		return if (destinationIdInNavController == destinationIdOfThisFragment) {
			view?.setTag(id, destinationIdOfThisFragment)
			true
		} else {
			logDebug { "May not navigate: current destination is not the current fragment." }
			false
		}
	}

	private fun View.mayNavigate(@IdRes id: Int): Boolean {
		val navController = this.findNavController()
		val destinationIdInNavController = navController.currentDestination?.id
		val destinationIdOfThisFragment = getTag(id) ?: destinationIdInNavController

		return if (destinationIdInNavController == destinationIdOfThisFragment) {
			setTag(id, destinationIdOfThisFragment)
			true
		} else {
			logDebug { "May not navigate: current destination is not the current fragment." }
			false
		}
	}