gistfile1.txt

# == Schema Information
#
# Table name: vouchers
#
#  id         :integer          not null, primary key
#  client_id  :integer
#  code       :string(255)
#  claimed    :boolean          default(FALSE)
#  claimed_at :datetime
#  created_at :datetime         not null
#  updated_at :datetime         not null
#  animal_id  :integer
#  expires_at :datetime
#

class Voucher < ActiveRecord::Base
  
  attr_accessible :client_id, :animal_id, :claimed, :claimed_at, :expires_at

  belongs_to :client
  belongs_to :animal

  validates_presence_of :client_id, :code

  before_validation(on: :create) {
    generate_token(:code)
    self.expires_at = DateTime.now + 3.months
  }

  # If the voucher hasn't been claimed and was created 3 months ago
  # then it will be expired
  def expired?
    if claimed == true
      true
    elsif DateTime.now > expires_at
      true
    else
      false
    end
  end

  # Marks the voucher as claimed and sets the date & time it was
  # but only if it isn't already claimed
  def claim!
    unless claimed == true
    	self.claimed = true
    	self.claimed_at = DateTime.now
    	self.save!
    end
  end

  def self.search(search, page)
    paginate per_page: 10, page: page, conditions: ["code like ?", "%#{search}%"], order: "code"
  end

  protected

  def generate_token(column)
    begin
      self[column] = SecureRandom.hex(3).upcase
    end while Voucher.exists?(column => self[column])
  end

end