class Faker::NationalHealthService

Public Class Methods

british_number() click to toggle source
# File lib/faker/default/nhs.rb, line 6
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
check_digit(legacy_number = NOT_GIVEN, number: 0) click to toggle source
# File lib/faker/default/nhs.rb, line 18
def check_digit(legacy_number = NOT_GIVEN, number: 0)
  warn_for_deprecated_arguments do |keywords|
    keywords << :number if legacy_number != NOT_GIVEN
  end

  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