user_level.rb

class UserLevel
  attr_reader :user
  attr_accessor :level

  LEVELS = {
    1: 5,
    2: 10,
    3: 25,
    4: 40
  }

  def initialize(user)
    @user = user
    calculate_level
  end

private

  def calculate_level(user_points)
    LEVELS.keys.each_pair do |numeric_level, points |
      if user_points >= points
        self.level = numeric_level
      end
    end
  end
end