417 lines
13 KiB
Ruby
417 lines
13 KiB
Ruby
# name: poll
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# about: Official poll plugin for Discourse
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# version: 0.9
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# authors: Vikhyat Korrapati (vikhyat), Régis Hanol (zogstrip)
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# url: https://github.com/discourse/discourse/tree/master/plugins/poll
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register_asset "stylesheets/common/poll.scss"
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register_asset "stylesheets/common/poll-ui-builder.scss"
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register_asset "stylesheets/desktop/poll.scss", :desktop
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register_asset "stylesheets/mobile/poll.scss", :mobile
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PLUGIN_NAME ||= "discourse_poll".freeze
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DATA_PREFIX ||= "data-poll-".freeze
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after_initialize do
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module ::DiscoursePoll
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DEFAULT_POLL_NAME ||= "poll".freeze
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POLLS_CUSTOM_FIELD ||= "polls".freeze
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VOTES_CUSTOM_FIELD ||= "polls-votes".freeze
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MUTEX_PREFIX ||= PLUGIN_NAME
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autoload :PostValidator, "#{Rails.root}/plugins/poll/lib/post_validator"
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autoload :PollsValidator, "#{Rails.root}/plugins/poll/lib/polls_validator"
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autoload :PollsUpdater, "#{Rails.root}/plugins/poll/lib/polls_updater"
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autoload :VotesUpdater, "#{Rails.root}/plugins/poll/lib/votes_updater"
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class Engine < ::Rails::Engine
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engine_name PLUGIN_NAME
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isolate_namespace DiscoursePoll
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end
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end
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class DiscoursePoll::Poll
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class << self
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def vote(post_id, poll_name, options, user)
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DistributedMutex.synchronize("#{PLUGIN_NAME}-#{post_id}") do
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user_id = user.id
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post = Post.find_by(id: post_id)
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# post must not be deleted
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if post.nil? || post.trashed?
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raise StandardError.new I18n.t("poll.post_is_deleted")
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end
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# topic must not be archived
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if post.topic.try(:archived)
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raise StandardError.new I18n.t("poll.topic_must_be_open_to_vote")
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end
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# user must be allowed to post in topic
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unless Guardian.new(user).can_create_post?(post.topic)
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raise StandardError.new I18n.t("poll.user_cant_post_in_topic")
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end
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polls = post.custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD]
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raise StandardError.new I18n.t("poll.no_polls_associated_with_this_post") if polls.blank?
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poll = polls[poll_name]
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raise StandardError.new I18n.t("poll.no_poll_with_this_name", name: poll_name) if poll.blank?
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raise StandardError.new I18n.t("poll.poll_must_be_open_to_vote") if poll["status"] != "open"
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public_poll = (poll["public"] == "true")
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# remove options that aren't available in the poll
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available_options = poll["options"].map { |o| o["id"] }.to_set
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options.select! { |o| available_options.include?(o) }
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raise StandardError.new I18n.t("poll.requires_at_least_1_valid_option") if options.empty?
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poll["voters"] = poll["anonymous_voters"] || 0
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all_options = Hash.new(0)
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post.custom_fields[DiscoursePoll::VOTES_CUSTOM_FIELD] ||= {}
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post.custom_fields[DiscoursePoll::VOTES_CUSTOM_FIELD]["#{user_id}"] ||= {}
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post.custom_fields[DiscoursePoll::VOTES_CUSTOM_FIELD]["#{user_id}"][poll_name] = options
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post.custom_fields[DiscoursePoll::VOTES_CUSTOM_FIELD].each do |_, user_votes|
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next unless votes = user_votes[poll_name]
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votes.each { |option| all_options[option] += 1 }
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poll["voters"] += 1 if (available_options & votes.to_set).size > 0
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end
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poll["options"].each do |option|
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anonymous_votes = option["anonymous_votes"] || 0
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option["votes"] = all_options[option["id"]] + anonymous_votes
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if public_poll
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option["voter_ids"] ||= []
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if options.include?(option["id"])
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option["voter_ids"] << user_id if !option["voter_ids"].include?(user_id)
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else
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option["voter_ids"].delete(user_id)
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end
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end
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end
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post.custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD] = polls
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post.save_custom_fields(true)
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payload = { post_id: post_id, polls: polls }
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if public_poll
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payload.merge!(user: UserNameSerializer.new(user).serializable_hash)
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end
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MessageBus.publish("/polls/#{post.topic_id}", payload)
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return [poll, options]
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end
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end
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def toggle_status(post_id, poll_name, status, user_id)
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DistributedMutex.synchronize("#{PLUGIN_NAME}-#{post_id}") do
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post = Post.find_by(id: post_id)
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# post must not be deleted
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if post.nil? || post.trashed?
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raise StandardError.new I18n.t("poll.post_is_deleted")
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end
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# topic must not be archived
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if post.topic.try(:archived)
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raise StandardError.new I18n.t("poll.topic_must_be_open_to_toggle_status")
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end
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user = User.find_by(id: user_id)
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# either staff member or OP
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unless user_id == post.user_id || user.try(:staff?)
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raise StandardError.new I18n.t("poll.only_staff_or_op_can_toggle_status")
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end
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polls = post.custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD]
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raise StandardError.new I18n.t("poll.no_polls_associated_with_this_post") if polls.blank?
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raise StandardError.new I18n.t("poll.no_poll_with_this_name", name: poll_name) if polls[poll_name].blank?
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polls[poll_name]["status"] = status
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post.save_custom_fields(true)
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MessageBus.publish("/polls/#{post.topic_id}", post_id: post.id, polls: polls)
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polls[poll_name]
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end
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end
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def extract(raw, topic_id, user_id = nil)
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# TODO: we should fix the callback mess so that the cooked version is available
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# in the validators instead of cooking twice
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cooked = PrettyText.cook(raw, topic_id: topic_id, user_id: user_id)
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parsed = Nokogiri::HTML(cooked)
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extracted_polls = []
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# extract polls
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parsed.css("div.poll").each do |p|
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poll = { "options" => [], "voters" => 0 }
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# extract attributes
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p.attributes.values.each do |attribute|
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if attribute.name.start_with?(DATA_PREFIX)
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poll[attribute.name[DATA_PREFIX.length..-1]] = CGI.escapeHTML(attribute.value || "")
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end
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end
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# extract options
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p.css("li[#{DATA_PREFIX}option-id]").each do |o|
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option_id = o.attributes[DATA_PREFIX + "option-id"].value || ""
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poll["options"] << { "id" => option_id, "html" => o.inner_html, "votes" => 0 }
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end
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# add the poll
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extracted_polls << poll
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end
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extracted_polls
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end
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end
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end
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require_dependency "application_controller"
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class DiscoursePoll::PollsController < ::ApplicationController
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requires_plugin PLUGIN_NAME
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before_action :ensure_logged_in, except: [:voters]
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def vote
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post_id = params.require(:post_id)
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poll_name = params.require(:poll_name)
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options = params.require(:options)
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begin
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poll, options = DiscoursePoll::Poll.vote(post_id, poll_name, options, current_user)
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render json: { poll: poll, vote: options }
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rescue StandardError => e
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render_json_error e.message
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end
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end
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def toggle_status
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post_id = params.require(:post_id)
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poll_name = params.require(:poll_name)
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status = params.require(:status)
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user_id = current_user.id
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begin
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poll = DiscoursePoll::Poll.toggle_status(post_id, poll_name, status, user_id)
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render json: { poll: poll }
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rescue StandardError => e
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render_json_error e.message
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end
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end
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def voters
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post_id = params.require(:post_id)
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poll_name = params.require(:poll_name)
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post = Post.find_by(id: post_id)
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raise Discourse::InvalidParameters.new("post_id is invalid") if !post
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poll = post.custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD][poll_name]
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raise Discourse::InvalidParameters.new("poll_name is invalid") if !poll
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voter_limit = (params[:voter_limit] || 25).to_i
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voter_limit = 0 if voter_limit < 0
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voter_limit = 50 if voter_limit > 50
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user_ids = []
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options = poll["options"]
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if poll["type"] != "number"
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per_option_voters = {}
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options.each do |option|
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if (params[:option_id])
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next unless option["id"] == params[:option_id].to_s
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end
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next unless option["voter_ids"]
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voters = option["voter_ids"].slice((params[:offset].to_i || 0) * voter_limit, voter_limit)
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per_option_voters[option["id"]] = Set.new(voters)
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user_ids << voters
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end
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user_ids.flatten!
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user_ids.uniq!
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poll_votes = post.custom_fields[DiscoursePoll::VOTES_CUSTOM_FIELD]
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result = {}
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User.where(id: user_ids).map do |user|
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user_hash = UserNameSerializer.new(user).serializable_hash
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poll_votes[user.id.to_s][poll_name].each do |option_id|
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if (params[:option_id])
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next unless option_id == params[:option_id].to_s
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end
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voters = per_option_voters[option_id]
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# we may have a user from a different vote
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next unless voters.include?(user.id)
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result[option_id] ||= []
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result[option_id] << user_hash
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end
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end
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else
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user_ids = options.map { |option| option["voter_ids"] }.sort!
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user_ids.flatten!
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user_ids.uniq!
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user_ids = user_ids.slice((params[:offset].to_i || 0) * voter_limit, voter_limit)
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result = []
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User.where(id: user_ids).map do |user|
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result << UserNameSerializer.new(user).serializable_hash
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end
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end
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render json: { poll_name => result }
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end
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end
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DiscoursePoll::Engine.routes.draw do
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put "/vote" => "polls#vote"
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put "/toggle_status" => "polls#toggle_status"
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get "/voters" => 'polls#voters'
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end
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Discourse::Application.routes.append do
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mount ::DiscoursePoll::Engine, at: "/polls"
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end
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Post.class_eval do
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attr_accessor :polls
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after_save do
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next if self.polls.blank? || !self.polls.is_a?(Hash)
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post = self
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polls = self.polls
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DistributedMutex.synchronize("#{PLUGIN_NAME}-#{post.id}") do
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post.custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD] = polls
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post.save_custom_fields(true)
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end
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end
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end
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validate(:post, :validate_polls) do |force = nil|
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# only care when raw has changed!
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return unless self.raw_changed? || force
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validator = DiscoursePoll::PollsValidator.new(self)
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return unless (polls = validator.validate_polls)
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if !polls.empty?
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validator = DiscoursePoll::PostValidator.new(self)
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return unless validator.validate_post
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end
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# are we updating a post?
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if self.id.present?
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DistributedMutex.synchronize("#{PLUGIN_NAME}-#{self.id}") do
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DiscoursePoll::PollsUpdater.update(self, polls)
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end
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else
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self.polls = polls
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end
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true
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end
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NewPostManager.add_handler(1) do |manager|
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post = Post.new(raw: manager.args[:raw])
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if !DiscoursePoll::PollsValidator.new(post).validate_polls
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result = NewPostResult.new(:poll, false)
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post.errors.full_messages.each do |message|
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result.errors[:base] << message
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end
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result
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else
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manager.args["is_poll"] = true
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nil
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end
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end
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on(:approved_post) do |queued_post, created_post|
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if queued_post.post_options["is_poll"]
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created_post.validate_polls(true)
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end
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end
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register_post_custom_field_type(DiscoursePoll::POLLS_CUSTOM_FIELD, :json)
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register_post_custom_field_type(DiscoursePoll::VOTES_CUSTOM_FIELD, :json)
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topic_view_post_custom_fields_whitelister do |user|
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user ? [DiscoursePoll::POLLS_CUSTOM_FIELD, DiscoursePoll::VOTES_CUSTOM_FIELD] : [DiscoursePoll::POLLS_CUSTOM_FIELD]
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end
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on(:reduce_cooked) do |fragment, post|
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if post.nil? || post.trashed?
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fragment.css(".poll, [data-poll-name]").each(&:remove)
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else
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post_url = "#{Discourse.base_url}#{post.url}"
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fragment.css(".poll, [data-poll-name]").each do |poll|
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poll.replace "<p><a href='#{post_url}'>#{I18n.t("poll.email.link_to_poll")}</a></p>"
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end
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end
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end
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# tells the front-end we have a poll for that post
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on(:post_created) do |post|
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next if post.is_first_post? || post.custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD].blank?
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MessageBus.publish("/polls/#{post.topic_id}", post_id: post.id,
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polls: post.custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD])
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end
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on(:merging_users) do |source_user, target_user|
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DiscoursePoll::VotesUpdater.merge_users!(source_user, target_user)
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end
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add_to_serializer(:post, :polls, false) do
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polls = post_custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD].dup
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polls.each do |_, poll|
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poll["options"].each do |option|
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option.delete("voter_ids")
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end
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end
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end
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add_to_serializer(:post, :include_polls?) { post_custom_fields.present? && post_custom_fields[DiscoursePoll::POLLS_CUSTOM_FIELD].present? }
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add_to_serializer(:post, :polls_votes, false) do
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post_custom_fields[DiscoursePoll::VOTES_CUSTOM_FIELD]["#{scope.user.id}"]
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end
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add_to_serializer(:post, :include_polls_votes?) do
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return unless scope.user
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return unless post_custom_fields.present?
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return unless post_custom_fields[DiscoursePoll::VOTES_CUSTOM_FIELD].present?
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post_custom_fields[DiscoursePoll::VOTES_CUSTOM_FIELD].has_key?("#{scope.user.id}")
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end
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end
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