class TrackingNumberValidator < ActiveModel::EachValidator def validate_each(record, attribute, value) unless valid?(value.to_s, options) record.errors[attribute] << (options.fetch(:message, false) || I18n.t('active_validation.errors.messages.tracking_number'.freeze)) end end private DEFAULT_CARRIERS_AND_SERVICES = { dhl: { express: /^([0-9]{9,9})([0-9])$/, express_air: /^([0-9]{10,10})([0-9])$/ }, fedex: { express: /^([0-9]{11,11})([0-9])$/, ground: /^([0-9]{14,14})([0-9])$/, ground18: /^[0-9]{2,2}([0-9]{15,15})([0-9])$/, ground96: /^96[0-9]{5,5}([0-9]{14,14})([0-9])$/, smart_post: /^((?:92)?[0-9]{5}[0-9]{14})([0-9])$/ }, ontrac: { express: /^(C[0-9]{13,13})([0-9])$/ }, ups: { express: /^1Z(\w{15,15})(\w)$/ }, usps: { usps13: /^([A-Z]{2,2})([0-9]{9,9})([A-Z]{2,2})$/, usps20: /^([0-9]{2,2})([0-9]{9,9})([0-9]{8,8})([0-9])$/, usps91: /^(?:420\d{5})?(9[1-5](?:[0-9]{19}|[0-9]{23}))([0-9])$/ } }.freeze # DHL DEFAULT_CARRIERS_AND_SERVICES.fetch(:dhl).each do |service, pattern| define_method("valid_dhl_#{service}_checksum?") do |value| formula = value.scan(pattern).flatten.compact return(false) if formula.empty? sequence, check_digit = formula.map(&:to_i) (sequence % 7) == check_digit end end # FedEx def valid_fedex_express_checksum?(value) return(false) unless value.size == 12 pattern = DEFAULT_CARRIERS_AND_SERVICES.fetch(:fedex).fetch(:express) formula = value.scan(pattern).flatten.compact return(false) if formula.empty? sequence, check_digit = formula total = 0 sequence.chars.zip([3, 1, 7, 3, 1, 7, 3, 1, 7, 3, 1].freeze).lazy.each do |(char1, char2)| total += (char1.to_i * char2) end (total % 11 % 10) == check_digit.to_i end DEFAULT_CARRIERS_AND_SERVICES.fetch(:fedex).only(:ground, :ground18, :ground96).each_with_index do |(service, pattern), i| define_method("valid_fedex_#{service}_checksum?") do |value| return(false) unless value.size == [15, 18, 22].freeze.at(i) formula = value.scan(pattern).flatten.compact return(false) if formula.empty? sequence, check_digit = formula total = 0 sequence.chars.reverse.lazy.each_with_index do |character, i| result = character.to_i result *= 3 if i.even? total += result end check = total % 10 check = (10 - check) unless check.zero? check == check_digit.to_i end end def valid_fedex_smart_post_checksum?(value) value = "92#{value}" unless value =~ /^92/ return(false) unless value.size == 22 pattern = DEFAULT_CARRIERS_AND_SERVICES.fetch(:fedex).fetch(:smart_post) formula = value.scan(pattern).flatten.compact return(false) if formula.empty? sequence, check_digit = formula total = 0 sequence.chars.reverse.lazy.each_with_index do |character, i| result = character.to_i result *= 3 if i.even? total += result end check = total % 10 check = (10 - check) unless check.zero? check == check_digit.to_i end # Ontrac & UPS DEFAULT_CARRIERS_AND_SERVICES.only(:ontrac, :ups).each_with_index do |(carrier, services), i| services.each do |service, pattern| define_method("valid_#{carrier}_#{service}_checksum?") do |value| return(false) unless value.size == [15, 18].freeze.at(i) formula = value.scan(pattern).flatten.compact return(false) if formula.empty? sequence, check_digit = formula total = 0 sequence.chars.lazy.each_with_index do |character, i| result = character[/[0-9]/] ? character.to_i : ((character[0].ord - 3) % 10) result *= 2 if i.odd? total += result end check = total % 10 check = 10 - check unless check.zero? check == check_digit.to_i end end end # USPS def valid_usps_usps13_checksum?(value) return(false) unless value.size == 13 pattern = DEFAULT_CARRIERS_AND_SERVICES.fetch(:usps).fetch(:usps13) sequence = value.scan(pattern).flatten.compact return(false) if sequence.empty? characters = sequence[1].chars check_digit = characters.pop.to_i total = 0 characters.zip([8, 6, 4, 2, 3, 5, 9, 7].freeze).lazy.each do |pair| total += (pair[0].to_i * pair[1].to_i) end remainder = total % 11 check = case remainder when 1 0 when 0 5 else 11 - remainder end check == check_digit end def valid_usps_usps20_checksum?(value) return(false) unless value.size == 20 pattern = DEFAULT_CARRIERS_AND_SERVICES.fetch(:usps).fetch(:usps20) sequence = value.scan(pattern).flatten.compact return(false) if sequence.empty? characters = sequence.first(3).join.chars check_digit = sequence.last.to_i total = 0 characters.reverse.lazy.each_with_index do |character, i| result = character.to_i result *= 3 if i.even? total += result end check = total % 10 check = (10 - check) unless check.zero? check == check_digit end def valid_usps_usps91_checksum?(value) value = "91#{value}" unless value =~ /^(420\d{5})?9[1-5]/ return(false) unless value.size == 22 pattern = DEFAULT_CARRIERS_AND_SERVICES.fetch(:usps).fetch(:usps91) sequence = value.scan(pattern).flatten.compact return(false) if sequence.empty? characters = sequence.first.chars check_digit = sequence.last.to_i total = 0 characters.reverse.lazy.each_with_index do |character, i| result = character.to_i result *= 3 if i.even? total += result end check = total % 10 check = (10 - check) unless check.zero? check == check_digit end # Base def valid_checksum?(value, options) carrier = options[:carrier] service = options[:service] result = false if carrier.nil? && service.nil? DEFAULT_CARRIERS_AND_SERVICES.each do |carrier, services| services.each_key do |carrier_service| result = send("valid_#{carrier}_#{carrier_service}_checksum?", value) break if result end break if result end elsif service.nil? DEFAULT_CARRIERS_AND_SERVICES.fetch(carrier).each_key do |carrier_service| result = send("valid_#{carrier}_#{carrier_service}_checksum?", value) break if result end else result = send("valid_#{carrier}_#{service}_checksum?", value) end return(result) end def valid_length?(value) value.present? end def valid?(value, options) valid_length?(value) && valid_checksum?(value, options) end end