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# frozen_string_literal: true
module Faker
class Barcode < Base
class << self
##
# Returns a EAN 8 or 13 digit format barcode number with check digit
# @return [String]
#
# @example
# Faker::Barcode.ean => "85657526"
# Faker::Barcode.ean(8) => "30152700"
# Faker::Barcode.ean(13) => "2115190480285"
#
# @faker.version 2.14.0
def ean(length = 8)
generate_barcode("barcode.ean_#{Integer(length)}")
end
##
# Returns a EAN 8 or 13 digit format barcode number with composite string attached with check digit
# @return [String]
#
# @example
# Faker::Barcode.ean_with_composite_sumbology => "41007624|JHOC6649"
# Faker::Barcode.ean_with_composite_sumbology(8) => "38357961|XUYJ3266"
# Faker::Barcode.ean_with_composite_sumbology(13) => "9530722443911|CKHWQHID"
#
# @faker.version 2.14.0
def ean_with_composite_symbology(length = 8)
"#{ean(length)}|#{bothify(parse('barcode.composite_symbol'))}"
end
##
# Returns a UPC_A format barcode number with check digit
# @return [String]
#
# @example
# Faker::Barcode.upc_a => "766807541831"
#
# @faker.version 2.14.0
def upc_a
generate_barcode('barcode.upc_a')
end
##
# Returns a UPC_E format barcode number with check digit
# @return [String]
#
# @example
# Faker::Barcode.upc_e => "03746820"
#
# @faker.version 2.14.0
def upc_e
generate_barcode('barcode.upc_e')
end
##
# Returns a UPC_A format barcode number with composite string attached with check digit
# @return [String]
#
# @example
# Faker::Barcode.upc_a_with_composite_symbology => "790670155765|JOVG6208"
#
# @faker.version 2.14.0
def upc_a_with_composite_symbology
"#{upc_a}|#{bothify(parse('barcode.composite_symbol'))}"
end
##
# Returns a UPC_E format barcode number with composite string attached with check digit
# @return [String]
#
# @example
# Faker::Barcode.upc_e_with_composite_symbology => "05149247|BKZX9722"
#
# @faker.version 2.14.0
def upc_e_with_composite_symbology
"#{upc_e}|#{bothify(parse('barcode.composite_symbol'))}"
end
##
# Returns a ISBN format barcode number with check digit
# @return [String]
#
# @example
# Faker::Barcode.isbn => "9798363807732"
#
# @faker.version 2.14.0
def isbn
generate_barcode('barcode.isbn')
end
##
# Returns a ISMN format barcode number with check digit
# @return [String]
#
# @example
# Faker::Barcode.ismn => "9790527672897"
#
# @faker.version 2.14.0
def ismn
generate_barcode('barcode.ismn')
end
##
# Returns a ISSN format barcode number with check digit
# @return [String]
#
# @example
# Faker::Barcode.issn => "9775541703338"
#
# @faker.version 2.14.0
def issn
generate_barcode('barcode.issn')
end
private
def generate_barcode(key)
barcode = parse(key)
check_digit = generate_check_digit(*sum_even_odd(barcode))
"#{barcode}#{check_digit}"
end
##
# Returns the sum of even and odd numbers from value passed
#
# @return [Array]
#
# @example
# Faker::Barcode.send(:sum_even_odd, 12345) => [9, 5]
# Faker::Barcode.send(:sum_even_odd, 87465) => [17, 13]
#
# @faker.version 2.14.0
def sum_even_odd(fake_num)
number = fake_num.to_i
sum_even, sum_odd = 0, 0, index = 1
while number != 0
index.even? ? sum_even += number % 10 : sum_odd += number % 10
number /= 10
index += 1
end
[sum_odd, sum_even]
end
##
# Generates the check digits from sum passed
#
# @return [Integer]
#
# @example
# Faker::Barcode.send(:generate_check_digit, 12, 4) => 0
# Faker::Barcode.send(:generate_check_digit, 23, 5) => 6
#
# @faker.version 2.14.0
def generate_check_digit(odd_sum, even_sum)
(10 - (odd_sum * 3 + even_sum) % 10) % 10
end
end
end
end
|
