# frozen_string_literal: true

module DiscourseCalendar
  class GroupTimezones
    def self.update(post)
      groups = []

      Nokogiri::HTML(post.cooked).css('div.group-timezones').map do |group_timezones|
        group_timezones.attributes.values.each do |attribute|
          if attribute.name == 'data-group'
            group_name = CGI.escapeHTML(attribute.value || "")
            groups << group_name if group_name.present?
          end
        end
      end

      post.group_timezones = groups.present? ? { groups: groups } : nil
      post.save_custom_fields
    end
  end
end