namespace :emails do
  desc "get all emails from nicknames"
  task take_emails: :environment do
    REGEXP_EMAIL = /\A[-a-z0-9_+\.]+\@([-a-z0-9]+\.)+[a-z0-9]{2,4}\z/i

    Nickname.in_batches(of: 15).each do |nicknames|
      nicknames.each do |hash|
        nick_last = Nickname.all.select(:id).order(:id).last[:id]
        output = %x[github-email #{hash[:name]}]
        data = (output.gsub /[\e\n\t]/, " ").split
        selected = data.select { |emails| emails =~ REGEXP_EMAIL }
        selected.uniq.map { |email| Email.create(email: email, nickname_id: hash[:id]) }

        if hash[:id] == nick_last
          break
        end
      end

      nicknames.delete_all
      sleep 900
    end
  end
end