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# frozen_string_literal: true
module FFaker
module IdentificationKR
extend ModuleUtils
extend self
# Resident Registration Number
# http://ko.wikipedia.org/wiki/%EC%A3%BC%EB%AF%BC%EB%93%B1%EB%A1%9D%EB%B2%88%ED%98%B8
def rrn
birth = fetch_sample(::Date.new(1970, 1, 1)..::Date.new(1999, 12, 31)).strftime('%y%d%m')
sex = fetch_sample([1, 2])
loc = FFaker.numerify("#{fetch_sample(Array('00'..'95'))}###")
a, b, c, d, e, f, g, h, i, j, k, l = "#{birth}#{sex}#{loc}".chars.map(&:to_i)
checksum = (
11 - (
(
(2 * a) + (3 * b) + (4 * c) + (5 * d) + (6 * e) + (7 * f) + (8 * g) + (9 * h) +
(2 * i) + (3 * j) + (4 * k) + (5 * l)
) % 11
)
) % 10
"#{birth}-#{sex}#{loc}#{checksum}"
end
end
end
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