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Merge pull request #20 from fixtheclouds/code

Added Faker::Code
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Aşkın Gedik 2022-02-21 13:47:34 +03:00 committed by GitHub
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@ -79,6 +79,17 @@ Faker::Business.credit_card_type #=> "visa"
``` ```
### Faker::Code
```crystal
Faker::Code.isbn #=> "640354399-7"
Faker::Code.imei #=> "531691246033652"
```
### Faker::Commerce ### Faker::Commerce
```crystal ```crystal

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spec/code_spec.cr Normal file
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require "./spec_helper"
describe Faker::Code do
it "base 10 isbn" do
Faker::Code.isbn.match(/^\d{9}-[\d|X]$/).should_not eq nil
end
it "base 13 isbn" do
Faker::Code.isbn(13).match(/^\d{12}-\d$/).should_not eq nil
end
it "imei" do
Faker::Code.imei.match(/\A[\d.:\-\s]+\z/i).should_not eq nil
end
it "should return deterministic results when seeded" do
Faker.seed 123456
Faker::Code.isbn.should eq "394314441-0"
Faker::Code.isbn(13).should eq "205982563728-9"
Faker::Code.imei.should eq "860839366575918"
end
end

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src/faker/code.cr Normal file
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module Faker
class Code < Base
RBI = %w[01 10 30 33 35 44 45 49 50 51 52 53 54 86 91 98 99]
def self.isbn(base : Int32 = 10)
case base
when 10 then generate_base10_isbn
when 13 then generate_base13_isbn
else raise ArgumentError.new("base must be 10 or 13")
end
end
def self.imei
str = Array.new(15, 0)
sum = 0
len = 15
# Fill in the first two values of the string based with the specified prefix.
arr = RBI.sample(Faker.rng)
str[0] = arr[0].to_i
str[1] = arr[1].to_i
pos = 2
# Fill all the remaining numbers except for the last one with random values.
while pos < (len - 1)
str[pos] = Faker.rng.rand(0..9)
pos += 1
end
# Calculate the Luhn checksum of the values thus far
len_offset = (len + 1) % 2
(0..(len - 1)).each do |position|
if (position + len_offset).odd?
t = str[position] * 2
t -= 9 if t > 9
sum += t
else
sum += str[position]
end
end
str[len - 1] = (10 - (sum % 10)) % 10
str.join("")
end
private def self.generate_base10_isbn
values = Faker.regexify(/\d{9}/)
remainder = sum(values) { |value, index| (index + 1) * value.to_i } % 11
values += "-#{remainder == 10 ? 'X' : remainder}"
end
private def self.generate_base13_isbn
values = Faker.regexify(/\d{12}/)
remainder = sum(values) { |value, index| index.even? ? value.to_i : value.to_i * 3 } % 10
values += "-#{(10 - remainder) % 10}"
end
private def self.sum(values)
values.split(//).each_with_index.reduce(0) do |sum, (value, index)|
sum + yield(value, index)
end
end
end
end