Class: Exception5

Inherits:
BaseException show all
Defined in:
lib/uk_account_validator/exceptions/exception_5.rb

Overview

Perform the first check (standard modulus check) except:

* If the sorting code appears in SCSUBTAB.txt, substitute it for the
  "substitute with" column (for check purposes only).
  If the sorting code is not found, use the original sorting code.

For the standard check with exception 5 the checkdigit is g from the original account number.

* After dividing the result by 11:
  - if the remainder = 0 and g = 0 the  number is valid
  - if the remainder = 1 the  number is invalid
  - for all other remainders, take the remainder away from 11. If the number
    you get is the same as g then the  number is valid.

Perform the second double alternate check, and for the double alternate check with exception 5 the checkdigit is h from the original account number, except:

* After dividing the result by 10:
  - if the remainder = 0 and h = 0 the  number is valid
  - for all other remainders, take the remainder away from 10. If the number
    you get is the same as h then the  number is valid.

Constant Summary

Constants included from NumberIndices

NumberIndices::NUMBER_INDEX

Instance Attribute Summary

Attributes inherited from BaseException

#account_number, #check_number, #modulus_weight, #sort_code

Instance Method Summary collapse

Methods inherited from BaseException

#after_calculate_total, allow_any?, #apply_account_number_substitutions, #initialize, #replace_weight, #zero_all, #zero_u_b

Constructor Details

This class inherits a constructor from BaseException

Instance Method Details

#apply_sort_code_substitutions ⇒ Object 



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# File 'lib/uk_account_validator/exceptions/exception_5.rb', line 21

def apply_sort_code_substitutions
  substitutions = UkAccountValidator.read_sort_code_substitution

  return substitutions[sort_code] if substitutions.keys.include?(sort_code)

  return sort_code
end

#override_test? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/uk_account_validator/exceptions/exception_5.rb', line 29

def override_test?
  true
end

#test(modulus, total, test_digits, test) ⇒ Object 



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# File 'lib/uk_account_validator/exceptions/exception_5.rb', line 33

def test(modulus, total, test_digits, test)
  if test == :double_alternate
    check_digit = :h
  else
    check_digit = :g
  end

  check_sum    = total % modulus
  expected_sum = test_digits[NUMBER_INDEX[check_digit]].to_i

  return false if check_sum == 1 && check_digit == :g
  return true  if check_sum == 0 && expected_sum == 0

  return (modulus - check_sum) == expected_sum
end