Class: Dixon::Validators::Taiwan

Inherits:
Object
  • Object
show all
Includes:
ValidateFormat
Defined in:
lib/dixon/validators/taiwan.rb,
lib/dixon/validators/taiwan.rb

Constant Summary collapse

INVALID_MESSAGE = 
'Invalid ID number.'
LETTER_ISSUED_BY = 
{
  # Active Letters
  'A' => 'Taipei City'     , 'B' => 'Taichung City',
  'C' => 'Keelung City'    , 'D' => 'Tainan City',
  'E' => 'Kaohsiung City'  , 'F' => 'New Taipei City',
  'G' => 'Yilan County'    , 'H' => 'Taoyuan County',
  'I' => 'Chiayi City'     , 'J' => 'Hsinchu County',
  'K' => 'Miaoli County'   , 'M' => 'Nantou County',
  'N' => 'Changhua County' , 'O' => 'Hsinchu City',
  'P' => 'Yunlin County'   , 'Q' => 'Chiayi County',
  'T' => 'Pingtung County' , 'U' => 'Hualien County',
  'V' => 'Taitung County'  , 'W' => 'Kinmen County',
  'X' => 'Penghu County'   , 'Z' => 'Lienchiang County',
  # Letters no longer issued
  'L' => 'Taichung County' ,
  'R' => 'Tainan County'   ,
  'S' => 'Kaohsiung County',
  'Y' => 'Yangmingshan Management Bureau'
}
LETTER_NUMBERS = 
{
  'A' => '10', 'B' => '11', 'C' => '12', 'D' => '13', 'E' => '14',
  'F' => '15', 'G' => '16', 'H' => '17', 'J' => '18', 'K' => '19',
  'L' => '20', 'M' => '21', 'N' => '22', 'P' => '23', 'Q' => '24',
  'R' => '25', 'S' => '26', 'T' => '27', 'U' => '28', 'V' => '29',
  'X' => '30', 'Y' => '31', 'W' => '32', 'Z' => '33', 'I' => '34',
  'O' => '35'
}
RULE_NUMBERS = 
[1, 9, 8, 7, 6, 5, 4, 3, 2, 1, 1]

Constants included from ValidateFormat

ValidateFormat::TAIWAN_ID_REGEXP

Instance Method Summary collapse

Methods included from ValidateFormat

#valid_format?

Instance Method Details

#checks(id) ⇒ Object

Check if a given ID is valid. ‘id` must be a string, case is insensitive. First convert ID into all numbers, then multiply to RULE_NUMBERS element by element. Sum up and take a 10 modulo then check if remainder is 0. If it’s, return true, false otherwise.



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# File 'lib/dixon/validators/taiwan.rb', line 43

def checks(id)
  # "F127337575" => [1, 5, 1, 2, 7, 3, 3, 7, 5, 7, 5]
  converted = convert id.to_s
  #    [1,  5,  1,  2,  7,  3,  3,  7,  5,  7, 5]
  #  * [1,  9,  8,  7,  6,  5,  4,  3,  2,  1, 1]
  #  --------------------------------------------
  # sum 1, 45,  8, 14, 43, 15, 12, 21, 10,  7, 5
  # => 180
  # 180 mod 10, is the remainder equal to zero? If so, return true.
  #
  return (mapcar(-> (a,b) { a * b }, converted, RULE_NUMBERS).reduce(:+).divmod 10)[1] == 0
end

#gender(id) ⇒ Object

Returns gender for given ID. By check the second digit of ID. 1 is male, 2 is female.



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# File 'lib/dixon/validators/taiwan.rb', line 59

def gender(id)
  case id[1]
    when '1' then 'male'
    when '2' then 'female'
    else puts INVALID_MESSAGE
  end
end

#issued_by(id) ⇒ Object

Returns local agencies who issued your id.



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# File 'lib/dixon/validators/taiwan.rb', line 68

def issued_by(id)
  LETTER_ISSUED_BY[id[0]]
end