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Versions: 11
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Stored size: 1.36 KB
Contents
class GtinValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
unless valid?(value, options)
record.errors[attribute] << (options[:message] || I18n.t('flash_validators.errors.messages.gtin'))
end
end
private
def includes_key?(value, options)
value.any? { |key| options.keys.include?(key) }
end
def valid_format?(value, options)
if options[:strict]
value =~ /^[0-9]+$/
else
value =~ /^[0-9 ]+$/
end
end
def valid_length?(value, options)
value_size = value.size
case options[:format]
when :ean_8, :gtin_8, :ucc_8
value_size == 8
when :gtin_12, :upc, :upc_a
value_size == 12
when :ean, :ean_13, :gtin_13, :ucc_13
value_size == 13
when :gtin_14, :ucc_14
value_size == 14
else
[8, 12, 13, 14].include?(value_size)
end
end
def valid_checksum?(value)
reversed_values = value.reverse
odd = even = 0
(1..(reversed_values.length - 1)).each do |i|
i.even? ? (even += reversed_values[i].chr.to_i) : (odd += reversed_values[i].chr.to_i)
end
reversed_values[0].chr.to_i == (10 - ((odd * 3) + even) % 10)
end
def valid?(value, options)
striped_value = value.to_s.gsub(/\D/, '')
valid_format?(value, options) &&
valid_length?(striped_value, options) &&
valid_checksum?(striped_value)
end
end
Version data entries
11 entries across 11 versions & 1 rubygems