Class: Luhnacy

Inherits:
Object
  • Object
show all
Defined in:
lib/luhnacy.rb

Class Method Summary collapse

Class Method Details

.generate(string_size, options = {}) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/luhnacy.rb', line 11

def self.generate(string_size, options={})
  raise ArgumentError, "prefix must be numeric" if options[:prefix] && !(options[:prefix] =~ /^\d*$/)

  output = options[:prefix] || ''
  (string_size-output.size-1).times do |n|
    output += rand(10).to_s
  end
  output += '0'

  if options[:invalid]
    case calc_modulus(output)
    when 0
      output = output[0...-1] + (rand(8) + 1).to_s
    when [1..8]
      output = output[0...-1] + ((10 - calc_modulus(output))/2).to_s
    when 9
      output = output[0...-1] + (rand(7) + 2).to_s
    end
  else
    unless calc_modulus(output) == 0
      output = output[0...-1] + (10 - calc_modulus(output)).to_s
    end
  end

  output
end

.method_missing(type, *args) ⇒ Object

Raises:

  • (NoMethodError) 


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# File 'lib/luhnacy.rb', line 38

def self.method_missing(type, *args)
  card_type, method_type = parse_method_name(type)
                                                
  raise NoMethodError unless @cards[card_type] && @cards[card_type][:prefixes] && @cards[card_type][:size]

  send(method_type, *(args.unshift(card_type)))
end

.valid?(candidate) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/luhnacy.rb', line 7

def self.valid?(candidate)
  calc_modulus(candidate) == 0
end