namespace :metamaps do
  desc "delivers recent map activity digest emails to users"
  task deliver_map_activity_emails: :environment do
    summarize_map_activity
  end

  def summarize_map_activity
    Follow.active.where(followed_type: 'Map').find_each do |follow|
      map = follow.followed
      user = follow.user
      # add logging and rescue-ing
      # and a notification of failure
      next unless MapPolicy.new(user, map).show? # just in case the permission changed
      next unless user.emails_allowed
      summary_data = MapActivityService.summarize_data(map, user)
      next if summary_data[:stats].blank?
      MapActivityMailer.daily_summary(user, map, summary_data).deliver_later
    end
  end
end