require 'open3'

module HomeHelper

  def list_all_users
    stdout, stderr, status = Open3.capture3('getent', 'passwd')
    return [] unless status.success?
    valid_users = stdout.split("\n").select { |user| user.start_with?(/\w/) }.map(&:split).map(&:first)
    valid_users.map do |user|
      user.split(':')[0]
    end
  end

  def users_with_public_html(users)
    users.select do |user|
      home_dir = Dir.home(user)
      File.exist?(File.join(home_dir, 'public_html'))
    end
  end

  users = list_all_users
  users_with_public_html(users)
end