map users to mailchimp list

users_to_mailchimp.rb

Gibbon::API.key = ENV['GIBBON_API']
api = Gibbon::API.new
list_id = ENV['SARAFAN_MC_LIST']

to_mailchimp = -> (u) {
  api.lists.subscribe({
    id: list_id,
    email: { email: u.email },
    merge_vars: {
      'CATEGORY' => u.business.category.translit,
      'CITY' => u.city.translit,
      'optin_time' => u.created_at.to_s
    }.merge(%w/FNAME LNAME/.zip( u.name.split(' ', 2) ).to_h),
    double_optin: false,
    update_existing: true
  })
}

banned = []

User.joins(:ownership).includes({ ownership: { business: :category } }, :city).tap do |business_owners|
  business_owners.find_each do |user|
    begin
      to_mailchimp[user]
    rescue Gibbon::MailChimpError => e
      banned << user.id
    end
  end
end