class VatId

# File lib/vat_id.rb, line 14
def initialize(code)
  @code = code.to_s.upcase.gsub(/[^A-Z0-9]/, '')
end

# File lib/vat_id.rb, line 6
def self.specifications
  @@specs ||= YAML.load_file(File.expand_path('vat_id/specs.yml', File.dirname(__FILE__)))
end

# File lib/vat_id.rb, line 10
def self.valid?(code)
  new(code).valid?
end

# File lib/vat_id.rb, line 18
def country_code
  @code[0..1]
end

# File lib/vat_id.rb, line 22
def identifier
  @code[2..-1]
end

# File lib/vat_id.rb, line 26
def to_s
  @code
end

# File lib/vat_id.rb, line 30
def valid?
  !!specification && !!identifier.match(/^#{specification}$/)
end

# File lib/vat_id.rb, line 36
def specification
  self.class.specifications[country_code.downcase]
end