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module Sjekksum
#
# Module for calculation and validation of Primitive97 checksums
#
# This primitive checksum is based on the modulo 97 (calculation of check digits) and modulo 9 (reduction to a single digit).
#
module Primitive97
extend self
extend Shared
#
# Calculates Primitive97 checksum
#
# @example
# Sjekksum::Primitive97.of(23569) #=> 5
#
# @param number [Integer, String] number for which the checksum should be calculated
#
# @return [Integer] calculated checksum
def of number
raise_on_type_mismatch number
(convert_to_int(number) % 97) % 9
end
alias_method :checksum, :of
#
# Primitive97 validation of provided number
#
# @example
# Sjekksum::Primitive97.valid?(235695) #=> true
#
# @param number [Integer, String] number with included checksum
#
# @return [Boolean]
def valid? number
raise_on_type_mismatch number
num, check = split_number(number)
self.of(num) == check
end
alias_method :is_valid?, :valid?
#
# Transforms a number by appending the Primitive97 checksum digit
#
# @example
# Sjekksum::Primitive97.convert(23569) #=> 235695
#
# @param number [Integer, String] number without a checksum
#
# @return [Integer, String] final number including the checksum
def convert number
raise_on_type_mismatch number
typed_conversion number
end
alias_method :transform, :convert
end
end
Version data entries
6 entries across 6 versions & 1 rubygems