Class: Cdigits::Luhn::Placeholder

Inherits:
Object
  • Object
show all
Defined in:
lib/cdigits/luhn/placeholder.rb

Constant Summary collapse

NON_ZERO_SYMBOL = 
'+'
NUMERIC_SYMBOL = 
'#'
CHECK_DIGIT_SYMBOL =
Note:

any good idia?

'?'

Instance Method Summary collapse

Constructor Details

#initialize(characters) ⇒ Placeholder

Returns a new instance of Placeholder.

Parameters:

  • characters (Array<String>) 


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# File 'lib/cdigits/luhn/placeholder.rb', line 14

def initialize(characters)
  @characters = characters
end

Instance Method Details

#fill(placeholder) ⇒ String

Generate code

Parameters:

  • placeholder (String)

Returns:

  • (String) 


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# File 'lib/cdigits/luhn/placeholder.rb', line 21

def fill(placeholder)
  codes = []
  store = build_store(placeholder) do |char, digit|
    codes << (digit.nil? ? char : nil)
  end

  store.fill_check_digit
  generate_code(codes, store.digits)
end

#valid?(placeholder) ⇒ Boolean

Validate code

Parameters:

  • placeholder (String)

Returns:

  • (Boolean) 


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# File 'lib/cdigits/luhn/placeholder.rb', line 34

def valid?(placeholder)
  store = build_store(placeholder)
  (store.sum % modulus).zero?
end