class RuboCop::Cop::Style::AlignHash::AlignmentOfValues

def all_have_same_separator?(node)
  first_separator = node.children.first.loc.operator.source
  node.children.butfirst.all? do |pair|
    pair.loc.operator.is?(first_separator)
  end
end

def checkable_layout(node)
  !any_pairs_on_the_same_line?(node) && all_have_same_separator?(node)
end

def deltas(first_pair, current_pair)
  key_delta = key_delta(first_pair, current_pair)
  current_separator = current_pair.loc.operator
  separator_delta = separator_delta(first_pair, current_separator,
                                    key_delta)
  value_delta = value_delta(first_pair, current_pair) -
                key_delta - separator_delta
  { key: key_delta, separator: separator_delta, value: value_delta }
end

def separator_delta(first_pair, current_separator, key_delta)
  if current_separator.is?(':')
    0 # Colon follows directly after key
  else
    hash_rocket_delta(first_pair, current_separator) - key_delta
  end
end