Sha256: 45aa75e5f900a56dd972f056876edf29040cd18eb9269214708e93be894630f5
Contents?: true
Size: 902 Bytes
Versions: 5
Compression:
Stored size: 902 Bytes
Contents
# frozen_string_literal: true
class Valvat
module Checksum
class FR < Base
# the valid characters for the first two digits (O and I are missing)
ALPHABET = '0123456789ABCDEFGHJKLMNPQRSTUVWXYZ'
NUMERIC = /^\d+$/.freeze
def validate
return super if str_wo_country[0..1] =~ NUMERIC
check = alt_check_digit
(str_wo_country[2..].to_i + 1 + (check / 11)) % 11 == check % 11
end
private
def check_digit
siren = str_wo_country[2..].to_i
(12 + ((3 * siren) % 97)) % 97
end
def given_check_digit
str_wo_country[0..1].to_i
end
def alt_check_digit
first_is_numeric = str_wo_country[0] =~ NUMERIC
(ALPHABET.index(str_wo_country[0]) * (first_is_numeric ? 24 : 34)) +
ALPHABET.index(str_wo_country[1]) - (first_is_numeric ? 10 : 100)
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems