EvilMartians First task

gistfile1.txt

# encoding: utf-8

class EmailPatternValidator < ActiveModel::EachValidator  
  def validate_each(record, attribute, value)
    if value.nil? || !value.match(/\b[A-Z0-9._%a-z\-]+@(?:[A-Z0-9a-z\-]+\.)+[A-Za-z]{2,4}\z/) 
      record.errors[attribute] << "HA HA! Not a valid email address"  
    end  
  end  
end

class User < ActiveRecord::Base

  validates :email, :presence => true, :uniqueness => true, :email_pattern => true

  
  def rating
    pokemons.all.inject(0.0) { |sum, pokemon| sum + pokemon.rating }
  end
  
  def can_be_charged?(amount)
    self.balance >= amount
  end

  def can_be_charged
    unless self.can_be_charged?(100)
      errors.add(:user, "не обладает достаточной суммой на балансе")
    end
  end
end