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Contents
# frozen_string_literal: true
module Faker
class NationalHealthService < Base
class << self
##
# Produces a random British NHS number.
#
# @return [String]
#
# @example
# Faker::NationalHealthService.british_number #=> "403 958 5577"
#
# @faker.version 1.9.2
def british_number
base_number = rand(400_000_001...499_999_999)
# If the check digit is equivalent to 10, the number is invalid.
# See https://en.wikipedia.org/wiki/NHS_number
base_number -= 1 if check_digit(number: base_number) == 10
"#{base_number}#{check_digit(number: base_number)}".to_s
.chars
.insert(3, ' ')
.insert(7, ' ')
.join
end
##
# Produces a random British NHS number's check digit.
#
# @param number [Integer] Specifies the NHS number the check digit belongs to.
# @return [Integer]
#
# @example
# Faker::NationalHealthService.check_digit(number: 400_012_114) #=> 6
#
# @faker.version 1.9.2
def check_digit(number: 0)
sum = 0
number.to_s.chars.each_with_index do |digit, idx|
position = idx + 1
sum += (digit.to_i * (11 - position))
end
result = 11 - (sum % 11)
# A value of 11 is considered the same as 0
# See https://en.wikipedia.org/wiki/NHS_number
return 0 if result == 11
result
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems