Class: EikValidator::Validator

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

Instance Method Summary collapse

Constructor Details

#initialize(eik) ⇒ Validator

Returns a new instance of Validator.



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# File 'lib/eik_validator.rb', line 12

def initialize(eik)
  @eik = eik.to_s
end

Instance Method Details

#calculate_sum(eik, multipliers) ⇒ Object 



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# File 'lib/eik_validator.rb', line 32

def calculate_sum(eik, multipliers)
  sum = 0
  multipliers.each_with_index do |value, index|
    sum += eik[index].to_i * value
  end
  sum
end

#check_validity(eik) ⇒ Object 



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# File 'lib/eik_validator.rb', line 40

def check_validity(eik)
  control_digit = eik.chars.last.to_i
  eik_multipliers(eik).each_with_index do |set, index|
    remainder = calculate_sum(eik, set) % 11
    return true if not remainder == 10 and remainder == control_digit
    return true if index == 1 and remainder == 10 and control_digit == 0
  end
  false
end

#eik_multipliers(eik) ⇒ Object 



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# File 'lib/eik_validator.rb', line 24

def eik_multipliers(eik)
  if eik.length == 9
    [[1, 2, 3, 4, 5, 6, 7, 8], [3, 4, 5, 6, 7, 8, 9, 10]]
  else
    [[2, 7, 3, 5], [4, 9, 5, 7]]
  end
end

#length_check ⇒ Object

Raises:



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# File 'lib/eik_validator.rb', line 20

def length_check
  raise EikLengthError unless @eik.length == 9 or @eik.length == 13
end

#numeric_check ⇒ Object

Raises:



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# File 'lib/eik_validator.rb', line 16

def numeric_check
  raise EikArgumentError unless ((Float(@eik) != nil) rescue false)
end

#validate ⇒ Object 



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# File 'lib/eik_validator.rb', line 50

def validate
  numeric_check
  length_check

  if @eik.length == 9
    check_validity(@eik)
  else
    return check_validity(@eik[-5..-1]) if check_validity(@eik[0..8])
    false
  end
end