22 lines
542 B
Ruby
22 lines
542 B
Ruby
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class SiretFormatValidator < ActiveModel::EachValidator
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def validate_each(record,attribute,value)
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unless value =~ /^\d{14}$/
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record.errors.add(attribute, :format)
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end
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unless value!= nil && (luhn_checksum(value) % 10 == 0)
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record.errors.add(attribute, :checksum)
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end
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end
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private
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def luhn_checksum(value)
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accum = 0
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value.reverse.each_char.map(&:to_i).each_with_index do |digit, index|
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t = index.even? ? digit : digit * 2
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t = t - 9 if t >= 10
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accum += t
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end
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accum
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end
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end
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