class CusipValidator

Public Instance Methods

validate_each(record, attribute, value) click to toggle source
# File lib/active_validation/validators/cusip_validator.rb, line 5
def validate_each(record, attribute, value)
  return if valid?(value.to_s)

  record.errors[attribute] <<
    (options[:message] || I18n.t('active_validation.errors.messages.cusip'))
end

Private Instance Methods

valid?(value) click to toggle source
# File lib/active_validation/validators/cusip_validator.rb, line 34
def valid?(value)
  valid_length?(value) &&
    valid_format?(value) &&
    valid_checksum?(value)
end
valid_checksum?(value) click to toggle source

rubocop:disable Lint/UselessAssignment

# File lib/active_validation/validators/cusip_validator.rb, line 15
def valid_checksum?(value)
  digits = value.chars.map { |chr| /[A-Z]/.match?(chr) ? (chr.ord - 55) : chr.to_i }
  even_values = digits.values_at(* digits.each_index.select(&:even?))
  odd_values = digits.values_at(* digits.each_index.select(&:odd?))
  values = odd_values.map { |int| int * 2 }.zip(even_values).flatten
  values = values.inject(0) { |sum, int| sum += (int / 10) + int % 10 }

  ((10 - values) % 10) % 10
end
valid_format?(value) click to toggle source

rubocop:enable Lint/UselessAssignment

# File lib/active_validation/validators/cusip_validator.rb, line 26
def valid_format?(value)
  value =~ /^[0-9A-Z]{9}$/
end
valid_length?(value) click to toggle source
# File lib/active_validation/validators/cusip_validator.rb, line 30
def valid_length?(value)
  value.present?
end