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Versions: 8
Compression:
Stored size: 1.32 KB
Contents
class Valvat
module Checksum
class GB < Base
OLD_FORMAT_FORBIDDEN_RANGES = [(100_000..999_999), (9_490_001..9_700_000), (9_990_001..9_999_999)]
NEW_FORMAT_FORBIDDEN_RANGES = [(1..100_000), (100_001..1_000_000)]
def validate
vat_number = vat.to_s_wo_country
check_sum = vat.to_s_wo_country[7..8].to_i
vat_base = vat_number[0..6]
# government departments and health authorities, so no checksum
return true if vat_number =~ /\A(GD[0-4]{1}\d{2})\Z/ || vat_number =~ /\A(HA[5-9]{1}\d{2})\Z/
return false if vat_number =~ /\A0{9}\Z/ || vat_number =~ /\A0{12}\Z/
vat_base_sum = vat_base.split('').
map(&:to_i).
zip([8, 7, 6, 5, 4, 3, 2]).
map { |vat_number_digit, multiplier| vat_number_digit * multiplier }.
inject(:+)
old_format_remainder = (vat_base_sum + check_sum).modulo(97)
new_format_remainder = (vat_base_sum + 55 + check_sum).modulo(97)
return false if old_format_remainder == 0 &&
OLD_FORMAT_FORBIDDEN_RANGES.any? { |range| range.include? vat_base.to_i }
return false if new_format_remainder == 0 &&
NEW_FORMAT_FORBIDDEN_RANGES.any? { |range| range.include? vat_base.to_i }
old_format_remainder == 0 || new_format_remainder == 0
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems