package board

// shuffle takes a list of Statuses and swaps its position with the Status closer to its desired
// position until it reaches it.
//
// This is currently used to move specified columns forwards or backwards on the Kanban board.
// When a column changes position the other columns shuffle forward or backwards as required.
func shuffle(list []Status, oldIndex, newIndex int) []Status {
	if newIndex == oldIndex {
		return list
	}

	if newIndex < oldIndex {
		for i := oldIndex; i > newIndex; i-- {
			list[i], list[i-1] = list[i-1], list[i]
		}

		return list
	}

	for i := oldIndex; i < newIndex; i++ {
		list[i], list[i+1] = list[i+1], list[i]
	}

	return list
}