Class: TaiwanValidator::IdValidator

Inherits:
ActiveModel::EachValidator
  • Object
show all
Defined in:
lib/taiwan_validator/id_validator.rb

Constant Summary collapse

MULTIPLIER = 
[1,9,8,7,6,5,4,3,2,1,1].freeze
FIRST_LETTER = 
HashWithIndifferentAccess.new(
  A: 10, B: 11, C: 12, D: 13, E: 14,
  F: 15, G: 16, H: 17, I: 34, J: 18,
  K: 19, M: 21, N: 22, O: 35, P: 23,
  Q: 24, T: 27, U: 28, V: 29, W: 32,
  X: 30, Z: 33
).freeze
DEPRECATED_FIRST_LETTER = 
HashWithIndifferentAccess.new(
  L: 20, R: 25, S: 26, Y: 31
).freeze
VALID_FIRST_LETTER = 
FIRST_LETTER.merge(DEPRECATED_FIRST_LETTER).freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.valid?(id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/taiwan_validator/id_validator.rb', line 16

def valid?(id)
  id = id.to_s
  return false if id.size != 10 || !(VALID_FIRST_LETTER.keys.include?(id[0])) || (id[1..9] =~ /\A\d+\Z/).nil?

  digits = (VALID_FIRST_LETTER[id[0]].to_s.chars + id[1..9].to_s.chars).map(&:to_i)
  results = digits.zip(MULTIPLIER).map { |r| r.inject(&:*) }.inject(&:+)

  results % 10 == 0
end

Instance Method Details

#validate_each(record, attribute, value) ⇒ Object 



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# File 'lib/taiwan_validator/id_validator.rb', line 27

def validate_each(record, attribute, value)
  unless self.class.valid?(value)
    record.errors.add(attribute, options[:message] || :invalid)
  end
end