module DiscoursePoll class PollsUpdater VALID_POLLS_CONFIGS = %w{type min max public}.map(&:freeze) def self.update(post, polls) # load previous polls previous_polls = post.custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD] || {} # extract options current_option_ids = extract_option_ids(polls) previous_option_ids = extract_option_ids(previous_polls) # are the polls different? if polls_updated?(polls, previous_polls) || (current_option_ids != previous_option_ids) has_votes = total_votes(previous_polls) > 0 # outside of the 5-minute edit window? if post.created_at < 5.minutes.ago && has_votes # cannot add/remove/rename polls if polls.keys.sort != previous_polls.keys.sort post.errors.add(:base, I18n.t("poll.cannot_change_polls_after_5_minutes")) return end # deal with option changes if User.staff.pluck(:id).include?(post.last_editor_id) # staff can only edit options polls.each_key do |poll_name| if polls[poll_name]["options"].size != previous_polls[poll_name]["options"].size && previous_polls[poll_name]["voters"].to_i > 0 post.errors.add(:base, I18n.t("poll.staff_cannot_add_or_remove_options_after_5_minutes")) return end end else # OP cannot edit poll options post.errors.add(:base, I18n.t("poll.op_cannot_edit_options_after_5_minutes")) return end end # try to merge votes polls.each_key do |poll_name| next unless previous_polls.has_key?(poll_name) return if has_votes && private_to_public_poll?(post, previous_polls, polls, poll_name) # when the # of options has changed, reset all the votes if polls[poll_name]["options"].size != previous_polls[poll_name]["options"].size PostCustomField.where(post_id: post.id, name: DiscoursePoll::VOTES_CUSTOM_FIELD).destroy_all post.clear_custom_fields next end polls[poll_name]["voters"] = previous_polls[poll_name]["voters"] polls[poll_name]["anonymous_voters"] = previous_polls[poll_name]["anonymous_voters"] if previous_polls[poll_name].has_key?("anonymous_voters") previous_options = previous_polls[poll_name]["options"] public_poll = polls[poll_name]["public"] == "true" polls[poll_name]["options"].each_with_index do |option, index| previous_option = previous_options[index] option["votes"] = previous_option["votes"] option["anonymous_votes"] = previous_option["anonymous_votes"] if previous_option.has_key?("anonymous_votes") if public_poll && previous_option.has_key?("voter_ids") option["voter_ids"] = previous_option["voter_ids"] end end end # immediately store the polls post.custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD] = polls post.save_custom_fields(true) # publish the changes MessageBus.publish("/polls/#{post.topic_id}", { post_id: post.id, polls: polls }) end end def self.polls_updated?(current_polls, previous_polls) return true if (current_polls.keys.sort != previous_polls.keys.sort) current_polls.each_key do |poll_name| if !previous_polls[poll_name] || (current_polls[poll_name].values_at(*VALID_POLLS_CONFIGS) != previous_polls[poll_name].values_at(*VALID_POLLS_CONFIGS)) return true end end false end def self.extract_option_ids(polls) polls.values.map { |p| p["options"].map { |o| o["id"] } }.flatten.sort end def self.total_votes(polls) polls.map { |key, value| value["voters"].to_i }.sum end private def self.private_to_public_poll?(post, previous_polls, current_polls, poll_name) previous_poll = previous_polls[poll_name] current_poll = current_polls[poll_name] if previous_polls["public"].nil? && current_poll["public"] == "true" error = if poll_name == DiscoursePoll::DEFAULT_POLL_NAME I18n.t("poll.default_cannot_be_made_public") else I18n.t("poll.named_cannot_be_made_public", name: poll_name) end post.errors.add(:base, error) return true end false end end end