class RuboCop::Cop::Rails::RelativeDateConstant

end
end
1.week.since
def self.expired_at
class SomeClass
# good
end
EXPIRED_AT = 1.week.since
class SomeClass
# bad
@example
Because the relative date will be evaluated only once.
This cop checks whether constant value isn’t relative date.

def autocorrect(node) 

def autocorrect(node)
  _scope, const_name, value = *node
  indent = ' ' * node.loc.column
  new_code = ["def self.#{const_name.downcase}",
              "#{indent}#{value.source}",
              'end'].join("\n#{indent}")
  ->(corrector) { corrector.replace(node.source_range, new_code) }
end

def check_node(node) 

def check_node(node)
  return unless node.irange_type? ||
                node.erange_type? ||
                node.send_type?
  # for range nodes we need to check both their boundaries
  nodes = node.send_type? ? [node] : node.children
  nodes.each do |n|
    if relative_date_method?(n)
      add_offense(node.parent, :expression, format(MSG, n.method_name))
    end
  end
end

def on_casgn(node) 

def on_casgn(node)
  _scope, _constant, rhs = *node
  # rhs would be nil in a or_asgn node
  return unless rhs
  check_node(rhs)
end

def on_masgn(node) 

def on_masgn(node)
  lhs, rhs = *node
  return unless rhs && rhs.array_type?
  lhs.children.zip(rhs.children).each do |(name, value)|
    check_node(value) if name.casgn_type?
  end
end

def on_or_asgn(node) 

def on_or_asgn(node)
  lhs, rhs = *node
  return unless lhs.casgn_type?
  check_node(rhs)
end

def relative_date_method?(node) 

def relative_date_method?(node)
  node.send_type? &&
    RELATIVE_DATE_METHODS.include?(node.method_name) &&
    !node.arguments?
end