fakeout customers CSV

fake_customers_csv.rb

#!/usr/bin/env ruby

require "faker"
require "csv"
require "tzinfo"

def weighted_boolean(true_weight, false_weight)
  random_weighted(true: true_weight, false: false_weight) == :true
end

def random_weighted(weighted)
  max = weighted.inject(0) { |sum, (item, weight)| sum + weight }
  target = rand(1..max)

  weighted.each do |item, weight|
    return item if target <= weight
    target -= weight
  end
end

path = "fake_customers.csv"
num_customers = 50

CSV.open(path, "w", headers: %w(id created_at email unsubscribed first_name last_name time_zone), write_headers: true) do |csv|
  num_customers.times do |idx|
    csv << [
      idx+100,
      Faker::Time.backward(days: 90).to_i,
      Faker::Internet.unique.email,
      weighted_boolean(1, 15),
      Faker::Name.first_name,
      Faker::Name.last_name,
      TZInfo::Timezone.us_zones.sample.to_s
    ]
  end
end