require_dependency 'slug' require_dependency 'avatar_lookup' require_dependency 'topic_view' require_dependency 'rate_limiter' require_dependency 'text_sentinel' require_dependency 'text_cleaner' require_dependency 'archetype' require_dependency 'html_prettify' require_dependency 'discourse_tagging' require_dependency 'search_indexer' require_dependency 'list_controller' require_dependency 'topic_posters_summary' require_dependency 'topic_featured_users' class Topic < ActiveRecord::Base class UserExists < StandardError; end include ActionView::Helpers::SanitizeHelper include RateLimiter::OnCreateRecord include HasCustomFields include Trashable include Searchable include LimitedEdit extend Forwardable def_delegator :featured_users, :user_ids, :featured_user_ids def_delegator :featured_users, :choose, :feature_topic_users def_delegator :notifier, :watch!, :notify_watch! def_delegator :notifier, :track!, :notify_tracking! def_delegator :notifier, :regular!, :notify_regular! def_delegator :notifier, :mute!, :notify_muted! def_delegator :notifier, :toggle_mute, :toggle_mute attr_accessor :allowed_user_ids, :tags_changed, :includes_destination_category DiscourseEvent.on(:site_setting_saved) do |site_setting| if site_setting.name.to_s == "slug_generation_method" && site_setting.saved_change_to_value? Scheduler::Defer.later("Null topic slug") do Topic.update_all(slug: nil) end end end def self.max_fancy_title_length 400 end def featured_users @featured_users ||= TopicFeaturedUsers.new(self) end def trash!(trashed_by = nil) if deleted_at.nil? update_category_topic_count_by(-1) CategoryTagStat.topic_deleted(self) if self.tags.present? end super(trashed_by) self.topic_embed.trash! if has_topic_embed? end def recover!(recovered_by = nil) unless deleted_at.nil? update_category_topic_count_by(1) CategoryTagStat.topic_recovered(self) if self.tags.present? end # Note parens are required because superclass doesn't take `recovered_by` super() unless (topic_embed = TopicEmbed.with_deleted.find_by_topic_id(id)).nil? topic_embed.recover! end end rate_limit :default_rate_limiter rate_limit :limit_topics_per_day rate_limit :limit_private_messages_per_day validates :title, if: Proc.new { |t| t.new_record? || t.title_changed? }, presence: true, topic_title_length: true, censored_words: true, quality_title: { unless: :private_message? }, max_emojis: true, unique_among: { unless: Proc.new { |t| (SiteSetting.allow_duplicate_topic_titles? || t.private_message?) }, message: :has_already_been_used, allow_blank: true, case_sensitive: false, collection: Proc.new { Topic.listable_topics } } validates :category_id, presence: true, exclusion: { in: Proc.new { [SiteSetting.uncategorized_category_id] } }, if: Proc.new { |t| (t.new_record? || t.category_id_changed?) && !SiteSetting.allow_uncategorized_topics && (t.archetype.nil? || t.regular?) } validates :featured_link, allow_nil: true, url: true validate if: :featured_link do errors.add(:featured_link, :invalid_category) unless !featured_link_changed? || Guardian.new.can_edit_featured_link?(category_id) end before_validation do self.title = TextCleaner.clean_title(TextSentinel.title_sentinel(title).text) if errors[:title].empty? self.featured_link = self.featured_link.strip.presence if self.featured_link end belongs_to :category has_many :category_users, through: :category has_many :posts has_many :ordered_posts, -> { order(post_number: :asc) }, class_name: "Post" has_many :topic_allowed_users has_many :topic_allowed_groups has_many :group_archived_messages, dependent: :destroy has_many :user_archived_messages, dependent: :destroy has_many :allowed_groups, through: :topic_allowed_groups, source: :group has_many :allowed_group_users, through: :allowed_groups, source: :users has_many :allowed_users, through: :topic_allowed_users, source: :user has_many :topic_tags has_many :tags, through: :topic_tags, dependent: :destroy # dependent destroy applies to the topic_tags records has_many :tag_users, through: :tags has_one :top_topic has_one :shared_draft, dependent: :destroy belongs_to :user belongs_to :last_poster, class_name: 'User', foreign_key: :last_post_user_id belongs_to :featured_user1, class_name: 'User', foreign_key: :featured_user1_id belongs_to :featured_user2, class_name: 'User', foreign_key: :featured_user2_id belongs_to :featured_user3, class_name: 'User', foreign_key: :featured_user3_id belongs_to :featured_user4, class_name: 'User', foreign_key: :featured_user4_id has_many :topic_users has_many :topic_links has_many :topic_invites has_many :invites, through: :topic_invites, source: :invite has_many :topic_timers, dependent: :destroy has_many :reviewables has_one :user_warning has_one :first_post, -> { where post_number: 1 }, class_name: 'Post' has_one :topic_search_data has_one :topic_embed, dependent: :destroy # When we want to temporarily attach some data to a forum topic (usually before serialization) attr_accessor :user_data attr_accessor :posters # TODO: can replace with posters_summary once we remove old list code attr_accessor :participants attr_accessor :topic_list attr_accessor :meta_data attr_accessor :include_last_poster attr_accessor :import_mode # set to true to optimize creation and save for imports # The regular order scope :topic_list_order, -> { order('topics.bumped_at desc') } # Return private message topics scope :private_messages, -> { where(archetype: Archetype.private_message) } scope :listable_topics, -> { where('topics.archetype <> ?', Archetype.private_message) } scope :by_newest, -> { order('topics.created_at desc, topics.id desc') } scope :visible, -> { where(visible: true) } scope :created_since, lambda { |time_ago| where('topics.created_at > ?', time_ago) } scope :secured, lambda { |guardian = nil| ids = guardian.secure_category_ids if guardian # Query conditions condition = if ids.present? ["NOT read_restricted OR id IN (:cats)", cats: ids] else ["NOT read_restricted"] end where("topics.category_id IS NULL OR topics.category_id IN (SELECT id FROM categories WHERE #{condition[0]})", condition[1]) } IN_CATEGORY_AND_SUBCATEGORIES_SQL = <<~SQL t.category_id = :category_id OR t.category_id IN (SELECT id FROM categories WHERE categories.parent_category_id = :category_id) SQL scope :in_category_and_subcategories, lambda { |category_id| where("topics.category_id = ? OR topics.category_id IN (SELECT id FROM categories WHERE categories.parent_category_id = ?)", category_id, category_id) if category_id } scope :with_subtype, ->(subtype) { where('topics.subtype = ?', subtype) } attr_accessor :ignore_category_auto_close attr_accessor :skip_callbacks before_create do initialize_default_values end after_create do unless skip_callbacks changed_to_category(category) advance_draft_sequence end end before_save do unless skip_callbacks ensure_topic_has_a_category end if title_changed? write_attribute(:fancy_title, Topic.fancy_title(title)) end if category_id_changed? || new_record? inherit_auto_close_from_category end end after_save do banner = "banner".freeze if archetype_before_last_save == banner || archetype == banner ApplicationController.banner_json_cache.clear end if tags_changed || saved_change_to_attribute?(:category_id) SearchIndexer.queue_post_reindex(self.id) if tags_changed TagUser.auto_watch(topic_id: id) TagUser.auto_track(topic_id: id) self.tags_changed = false end end SearchIndexer.index(self) end after_update do if saved_changes[:category_id] && self.tags.present? CategoryTagStat.topic_moved(self, *saved_changes[:category_id]) end end def initialize_default_values self.bumped_at ||= Time.now self.last_post_user_id ||= user_id end def inherit_auto_close_from_category if !self.closed && !@ignore_category_auto_close && self.category && self.category.auto_close_hours && !public_topic_timer&.execute_at self.set_or_create_timer( TopicTimer.types[:close], self.category.auto_close_hours, based_on_last_post: self.category.auto_close_based_on_last_post ) end end def advance_draft_sequence if self.private_message? DraftSequence.next!(user, Draft::NEW_PRIVATE_MESSAGE) else DraftSequence.next!(user, Draft::NEW_TOPIC) end end def ensure_topic_has_a_category if category_id.nil? && (archetype.nil? || self.regular?) self.category_id = category&.id || SiteSetting.uncategorized_category_id end end def self.visible_post_types(viewed_by = nil) types = Post.types result = [types[:regular], types[:moderator_action], types[:small_action]] result << types[:whisper] if viewed_by&.staff? result end def self.top_viewed(max = 10) Topic.listable_topics.visible.secured.order('views desc').limit(max) end def self.recent(max = 10) Topic.listable_topics.visible.secured.order('created_at desc').limit(max) end def self.count_exceeds_minimum? count > SiteSetting.minimum_topics_similar end def best_post posts.where(post_type: Post.types[:regular], user_deleted: false).order('score desc nulls last').limit(1).first end def has_flags? ReviewableFlaggedPost.pending.default_visible.where(topic_id: id).exists? end def is_official_warning? subtype == TopicSubtype.moderator_warning end # all users (in groups or directly targetted) that are going to get the pm def all_allowed_users moderators_sql = " UNION #{User.moderators.to_sql}" if private_message? && (has_flags? || is_official_warning?) User.from("(#{allowed_users.to_sql} UNION #{allowed_group_users.to_sql}#{moderators_sql}) as users") end # Additional rate limits on topics: per day and private messages per day def limit_topics_per_day if user && user.new_user_posting_on_first_day? limit_first_day_topics_per_day else apply_per_day_rate_limit_for("topics", :max_topics_per_day) end end def limit_private_messages_per_day return unless private_message? apply_per_day_rate_limit_for("pms", :max_personal_messages_per_day) end def self.fancy_title(title) return unless escaped = ERB::Util.html_escape(title) fancy_title = Emoji.unicode_unescape(HtmlPrettify.render(escaped)) fancy_title.length > Topic.max_fancy_title_length ? escaped : fancy_title end def fancy_title return ERB::Util.html_escape(title) unless SiteSetting.title_fancy_entities? unless fancy_title = read_attribute(:fancy_title) fancy_title = Topic.fancy_title(title) write_attribute(:fancy_title, fancy_title) if !new_record? && !Discourse.readonly_mode? # make sure data is set in table, this also allows us to change algorithm # by simply nulling this column DB.exec("UPDATE topics SET fancy_title = :fancy_title where id = :id", id: self.id, fancy_title: fancy_title) end end fancy_title end # Returns hot topics since a date for display in email digest. def self.for_digest(user, since, opts = nil) opts = opts || {} score = "#{ListController.best_period_for(since)}_score" topics = Topic .visible .secured(Guardian.new(user)) .joins("LEFT OUTER JOIN topic_users ON topic_users.topic_id = topics.id AND topic_users.user_id = #{user.id.to_i}") .joins("LEFT OUTER JOIN category_users ON category_users.category_id = topics.category_id AND category_users.user_id = #{user.id.to_i}") .joins("LEFT OUTER JOIN users ON users.id = topics.user_id") .where(closed: false, archived: false) .where("COALESCE(topic_users.notification_level, 1) <> ?", TopicUser.notification_levels[:muted]) .created_since(since) .where('topics.created_at < ?', (SiteSetting.editing_grace_period || 0).seconds.ago) .listable_topics .includes(:category) unless opts[:include_tl0] || user.user_option.try(:include_tl0_in_digests) topics = topics.where("COALESCE(users.trust_level, 0) > 0") end if !!opts[:top_order] topics = topics.joins("LEFT OUTER JOIN top_topics ON top_topics.topic_id = topics.id") .order(TopicQuerySQL.order_top_with_notification_levels(score)) end if opts[:limit] topics = topics.limit(opts[:limit]) end # Remove category topics category_topic_ids = Category.pluck(:topic_id).compact! if category_topic_ids.present? topics = topics.where("topics.id NOT IN (?)", category_topic_ids) end # Remove muted categories muted_category_ids = CategoryUser.where(user_id: user.id, notification_level: CategoryUser.notification_levels[:muted]).pluck(:category_id) if SiteSetting.digest_suppress_categories.present? muted_category_ids += SiteSetting.digest_suppress_categories.split("|").map(&:to_i) muted_category_ids = muted_category_ids.uniq end if muted_category_ids.present? topics = topics.where("topics.category_id NOT IN (?)", muted_category_ids) end # Remove muted tags muted_tag_ids = TagUser.lookup(user, :muted).pluck(:tag_id) unless muted_tag_ids.empty? # If multiple tags per topic, include topics with tags that aren't muted, # and don't forget untagged topics. topics = topics.where( "EXISTS ( SELECT 1 FROM topic_tags WHERE topic_tags.topic_id = topics.id AND tag_id NOT IN (?) ) OR NOT EXISTS (SELECT 1 FROM topic_tags WHERE topic_tags.topic_id = topics.id)", muted_tag_ids) end topics end def meta_data=(data) custom_fields.replace(data) end def meta_data custom_fields end def update_meta_data(data) custom_fields.update(data) save end def reload(options = nil) @post_numbers = nil @public_topic_timer = nil @private_topic_timer = nil @is_category_topic = nil super(options) end def post_numbers @post_numbers ||= posts.order(:post_number).pluck(:post_number) end def age_in_minutes ((Time.zone.now - created_at) / 1.minute).round end def self.listable_count_per_day(start_date, end_date, category_id = nil) result = listable_topics.where("topics.created_at >= ? AND topics.created_at <= ?", start_date, end_date) result = result.group('date(topics.created_at)').order('date(topics.created_at)') result = result.where(category_id: category_id) if category_id result.count end def private_message? archetype == Archetype.private_message end def regular? self.archetype == Archetype.default end MAX_SIMILAR_BODY_LENGTH ||= 200 def self.similar_to(title, raw, user = nil) return [] if title.blank? raw = raw.presence || "" search_data = "#{title} #{raw[0...MAX_SIMILAR_BODY_LENGTH]}".strip filter_words = Search.prepare_data(search_data) ts_query = Search.ts_query(term: filter_words, joiner: "|") candidates = Topic .visible .listable_topics .secured(Guardian.new(user)) .joins("JOIN topic_search_data s ON topics.id = s.topic_id") .joins("LEFT JOIN categories c ON topics.id = c.topic_id") .where("search_data @@ #{ts_query}") .where("c.topic_id IS NULL") .order("ts_rank(search_data, #{ts_query}) DESC") .limit(SiteSetting.max_similar_results * 3) candidate_ids = candidates.pluck(:id) return [] if candidate_ids.blank? similars = Topic .joins("JOIN posts AS p ON p.topic_id = topics.id AND p.post_number = 1") .where("topics.id IN (?)", candidate_ids) .order("similarity DESC") .limit(SiteSetting.max_similar_results) if raw.present? similars .select(sanitize_sql_array(["topics.*, similarity(topics.title, :title) + similarity(p.raw, :raw) AS similarity, p.cooked AS blurb", title: title, raw: raw])) .where("similarity(topics.title, :title) + similarity(p.raw, :raw) > 0.2", title: title, raw: raw) else similars .select(sanitize_sql_array(["topics.*, similarity(topics.title, :title) AS similarity, p.cooked AS blurb", title: title])) .where("similarity(topics.title, :title) > 0.2", title: title) end end def update_status(status, enabled, user, opts = {}) TopicStatusUpdater.new(self, user).update!(status, enabled, opts) DiscourseEvent.trigger(:topic_status_updated, self, status, enabled) end # Atomically creates the next post number def self.next_post_number(topic_id, opts = {}) highest = DB.query_single("SELECT coalesce(max(post_number),0) AS max FROM posts WHERE topic_id = ?", topic_id).first.to_i if opts[:whisper] result = DB.query_single(<<~SQL, highest, topic_id) UPDATE topics SET highest_staff_post_number = ? + 1 WHERE id = ? RETURNING highest_staff_post_number SQL result.first.to_i else reply_sql = opts[:reply] ? ", reply_count = reply_count + 1" : "" posts_sql = opts[:post] ? ", posts_count = posts_count + 1" : "" result = DB.query_single(<<~SQL, highest: highest, topic_id: topic_id) UPDATE topics SET highest_staff_post_number = :highest + 1, highest_post_number = :highest + 1 #{reply_sql} #{posts_sql} WHERE id = :topic_id RETURNING highest_post_number SQL result.first.to_i end end def self.reset_all_highest! DB.exec <<~SQL WITH X as ( SELECT topic_id, COALESCE(MAX(post_number), 0) highest_post_number FROM posts WHERE deleted_at IS NULL GROUP BY topic_id ), Y as ( SELECT topic_id, coalesce(MAX(post_number), 0) highest_post_number, count(*) posts_count, max(created_at) last_posted_at FROM posts WHERE deleted_at IS NULL AND post_type <> 4 GROUP BY topic_id ) UPDATE topics SET highest_staff_post_number = X.highest_post_number, highest_post_number = Y.highest_post_number, last_posted_at = Y.last_posted_at, posts_count = Y.posts_count FROM X, Y WHERE topics.archetype <> 'private_message' AND X.topic_id = topics.id AND Y.topic_id = topics.id AND ( topics.highest_staff_post_number <> X.highest_post_number OR topics.highest_post_number <> Y.highest_post_number OR topics.last_posted_at <> Y.last_posted_at OR topics.posts_count <> Y.posts_count ) SQL DB.exec <<~SQL WITH X as ( SELECT topic_id, COALESCE(MAX(post_number), 0) highest_post_number FROM posts WHERE deleted_at IS NULL GROUP BY topic_id ), Y as ( SELECT topic_id, coalesce(MAX(post_number), 0) highest_post_number, count(*) posts_count, max(created_at) last_posted_at FROM posts WHERE deleted_at IS NULL AND post_type <> 3 AND post_type <> 4 GROUP BY topic_id ) UPDATE topics SET highest_staff_post_number = X.highest_post_number, highest_post_number = Y.highest_post_number, last_posted_at = Y.last_posted_at, posts_count = Y.posts_count FROM X, Y WHERE topics.archetype = 'private_message' AND X.topic_id = topics.id AND Y.topic_id = topics.id AND ( topics.highest_staff_post_number <> X.highest_post_number OR topics.highest_post_number <> Y.highest_post_number OR topics.last_posted_at <> Y.last_posted_at OR topics.posts_count <> Y.posts_count ) SQL end # If a post is deleted we have to update our highest post counters def self.reset_highest(topic_id) archetype = Topic.where(id: topic_id).pluck(:archetype).first # ignore small_action replies for private messages post_type = archetype == Archetype.private_message ? " AND post_type <> #{Post.types[:small_action]}" : '' result = DB.query_single(<<~SQL, topic_id: topic_id) UPDATE topics SET highest_staff_post_number = ( SELECT COALESCE(MAX(post_number), 0) FROM posts WHERE topic_id = :topic_id AND deleted_at IS NULL ), highest_post_number = ( SELECT COALESCE(MAX(post_number), 0) FROM posts WHERE topic_id = :topic_id AND deleted_at IS NULL AND post_type <> 4 #{post_type} ), posts_count = ( SELECT count(*) FROM posts WHERE deleted_at IS NULL AND topic_id = :topic_id AND post_type <> 4 #{post_type} ), last_posted_at = ( SELECT MAX(created_at) FROM posts WHERE topic_id = :topic_id AND deleted_at IS NULL AND post_type <> 4 #{post_type} ) WHERE id = :topic_id RETURNING highest_post_number SQL highest_post_number = result.first.to_i # Update the forum topic user records DB.exec(<<~SQL, highest: highest_post_number, topic_id: topic_id) UPDATE topic_users SET last_read_post_number = CASE WHEN last_read_post_number > :highest THEN :highest ELSE last_read_post_number END, highest_seen_post_number = CASE WHEN highest_seen_post_number > :highest THEN :highest ELSE highest_seen_post_number END WHERE topic_id = :topic_id SQL end # This calculates the geometric mean of the posts and stores it with the topic def self.calculate_avg_time(min_topic_age = nil) builder = DB.build <<~SQL UPDATE topics SET avg_time = x.gmean FROM (SELECT topic_id, round(exp(avg(ln(avg_time)))) AS gmean FROM posts WHERE avg_time > 0 AND avg_time IS NOT NULL GROUP BY topic_id) AS x /*where*/ SQL builder.where <<~SQL x.topic_id = topics.id AND (topics.avg_time <> x.gmean OR topics.avg_time IS NULL) SQL if min_topic_age builder.where("topics.bumped_at > :bumped_at", bumped_at: min_topic_age) end builder.exec end def changed_to_category(new_category) return true if new_category.blank? || Category.exists?(topic_id: id) return false if new_category.id == SiteSetting.uncategorized_category_id && !SiteSetting.allow_uncategorized_topics Topic.transaction do old_category = category if self.category_id != new_category.id self.update_attribute(:category_id, new_category.id) if old_category Category .where(id: old_category.id) .update_all("topic_count = topic_count - 1") end # when a topic changes category we may have to start watching it # if we happen to have read state for it CategoryUser.auto_watch(category_id: new_category.id, topic_id: self.id) CategoryUser.auto_track(category_id: new_category.id, topic_id: self.id) if post = self.ordered_posts.first notified_user_ids = [post.user_id, post.last_editor_id].uniq DB.after_commit do Jobs.enqueue(:notify_category_change, post_id: post.id, notified_user_ids: notified_user_ids) end end end Category.where(id: new_category.id).update_all("topic_count = topic_count + 1") CategoryFeaturedTopic.feature_topics_for(old_category) unless @import_mode CategoryFeaturedTopic.feature_topics_for(new_category) unless @import_mode || old_category.try(:id) == new_category.id end true end def add_small_action(user, action_code, who = nil, opts = {}) custom_fields = {} custom_fields["action_code_who"] = who if who.present? opts = opts.merge( post_type: Post.types[:small_action], action_code: action_code, custom_fields: custom_fields ) add_moderator_post(user, nil, opts) end def add_moderator_post(user, text, opts = nil) opts ||= {} new_post = nil creator = PostCreator.new(user, raw: text, post_type: opts[:post_type] || Post.types[:moderator_action], action_code: opts[:action_code], no_bump: opts[:bump].blank?, topic_id: self.id, skip_validations: true, custom_fields: opts[:custom_fields]) if (new_post = creator.create) && new_post.present? increment!(:moderator_posts_count) if new_post.persisted? # If we are moving posts, we want to insert the moderator post where the previous posts were # in the stream, not at the end. new_post.update_attributes!(post_number: opts[:post_number], sort_order: opts[:post_number]) if opts[:post_number].present? # Grab any links that are present TopicLink.extract_from(new_post) QuotedPost.extract_from(new_post) end new_post end def change_category_to_id(category_id) return false if private_message? new_category_id = category_id.to_i # if the category name is blank, reset the attribute new_category_id = SiteSetting.uncategorized_category_id if new_category_id == 0 return true if self.category_id == new_category_id cat = Category.find_by(id: new_category_id) return false unless cat reviewables.update_all(category_id: new_category_id) changed_to_category(cat) end def remove_allowed_group(removed_by, name) if group = Group.find_by(name: name) group_user = topic_allowed_groups.find_by(group_id: group.id) if group_user group_user.destroy add_small_action(removed_by, "removed_group", group.name) return true end end false end def remove_allowed_user(removed_by, username) user = username.is_a?(User) ? username : User.find_by(username: username) if user topic_user = topic_allowed_users.find_by(user_id: user.id) if topic_user topic_user.destroy if user.id == removed_by&.id removed_by = Discourse.system_user add_small_action(removed_by, "user_left", user.username) else add_small_action(removed_by, "removed_user", user.username) end return true end end false end def reached_recipients_limit? return false unless private_message? topic_allowed_users.count + topic_allowed_groups.count >= SiteSetting.max_allowed_message_recipients end def invite_group(user, group) TopicAllowedGroup.create!(topic_id: id, group_id: group.id) last_post = posts.order('post_number desc').where('not hidden AND posts.deleted_at IS NULL').first if last_post Jobs.enqueue(:post_alert, post_id: last_post.id) add_small_action(user, "invited_group", group.name) group_id = group.id group.users.where( "group_users.notification_level > ? AND user_id != ?", NotificationLevels.all[:muted], user.id ).find_each do |u| u.notifications.create!( notification_type: Notification.types[:invited_to_private_message], topic_id: self.id, post_number: 1, data: { topic_title: self.title, display_username: user.username, group_id: group_id }.to_json ) end end true end def invite(invited_by, username_or_email, group_ids = nil, custom_message = nil) target_user = User.find_by_username_or_email(username_or_email) guardian = Guardian.new(invited_by) is_email = username_or_email =~ /^.+@.+$/ if target_user if topic_allowed_users.exists?(user_id: target_user.id) raise UserExists.new(I18n.t("topic_invite.user_exists")) end if invite_existing_muted?(target_user, invited_by) return true end if private_message? !!invite_to_private_message(invited_by, target_user, guardian) else !!invite_to_topic(invited_by, target_user, group_ids, guardian) end elsif is_email && guardian.can_invite_via_email?(self) !!Invite.invite_by_email( username_or_email, invited_by, self, group_ids, custom_message ) end end def invite_existing_muted?(target_user, invited_by) if invited_by.id && MutedUser.where(user_id: target_user.id, muted_user_id: invited_by.id) .joins(:muted_user) .where('NOT admin AND NOT moderator') .exists? return true end if TopicUser.where( topic: self, user: target_user, notification_level: TopicUser.notification_levels[:muted] ).exists? return true end false end def email_already_exists_for?(invite) invite.email_already_exists && private_message? end def grant_permission_to_user(lower_email) user = User.find_by_email(lower_email) topic_allowed_users.create!(user_id: user.id) unless topic_allowed_users.exists?(user_id: user.id) end def max_post_number posts.with_deleted.maximum(:post_number).to_i end def move_posts(moved_by, post_ids, opts) post_mover = PostMover.new(self, moved_by, post_ids, move_to_pm: opts[:archetype].present? && opts[:archetype] == "private_message") if opts[:destination_topic_id] topic = post_mover.to_topic(opts[:destination_topic_id], participants: opts[:participants]) DiscourseEvent.trigger(:topic_merged, post_mover.original_topic, post_mover.destination_topic ) topic elsif opts[:title] post_mover.to_new_topic(opts[:title], opts[:category_id], opts[:tags]) end end # Updates the denormalized statistics of a topic including featured posters. They shouldn't # go out of sync unless you do something drastic live move posts from one topic to another. # this recalculates everything. def update_statistics feature_topic_users update_action_counts Topic.reset_highest(id) end def update_action_counts update_column(:like_count, Post.where(topic_id: id).sum(:like_count)) end def posters_summary(options = {}) # avatar lookup in options @posters_summary ||= TopicPostersSummary.new(self, options).summary end def participants_summary(options = {}) @participants_summary ||= TopicParticipantsSummary.new(self, options).summary end def make_banner!(user) # only one banner at the same time previous_banner = Topic.where(archetype: Archetype.banner).first previous_banner.remove_banner!(user) if previous_banner.present? UserProfile.where("dismissed_banner_key IS NOT NULL") .update_all(dismissed_banner_key: nil) self.archetype = Archetype.banner self.add_small_action(user, "banner.enabled") self.save MessageBus.publish('/site/banner', banner) end def remove_banner!(user) self.archetype = Archetype.default self.add_small_action(user, "banner.disabled") self.save MessageBus.publish('/site/banner', nil) end def banner post = self.ordered_posts.first { html: post.cooked, key: self.id, url: self.url } end # Even if the slug column in the database is null, topic.slug will return something: def slug unless slug = read_attribute(:slug) return '' unless title.present? slug = Slug.for(title) if new_record? write_attribute(:slug, slug) else update_column(:slug, slug) end end slug end def title=(t) slug = Slug.for(t.to_s) write_attribute(:slug, slug) write_attribute(:fancy_title, nil) write_attribute(:title, t) end # NOTE: These are probably better off somewhere else. # Having a model know about URLs seems a bit strange. def last_post_url "#{Discourse.base_uri}/t/#{slug}/#{id}/#{posts_count}" end def self.url(id, slug, post_number = nil) url = "#{Discourse.base_url}/t/#{slug}/#{id}" url << "/#{post_number}" if post_number.to_i > 1 url end def url(post_number = nil) self.class.url id, slug, post_number end def self.relative_url(id, slug, post_number = nil) url = "#{Discourse.base_uri}/t/" url << "#{slug}/" if slug.present? url << id.to_s url << "/#{post_number}" if post_number.to_i > 1 url end def slugless_url(post_number = nil) Topic.relative_url(id, nil, post_number) end def relative_url(post_number = nil) Topic.relative_url(id, slug, post_number) end def clear_pin_for(user) return unless user.present? TopicUser.change(user.id, id, cleared_pinned_at: Time.now) end def re_pin_for(user) return unless user.present? TopicUser.change(user.id, id, cleared_pinned_at: nil) end def update_pinned(status, global = false, pinned_until = "") pinned_until ||= '' pinned_until = begin Time.parse(pinned_until) rescue ArgumentError end update_columns( pinned_at: status ? Time.zone.now : nil, pinned_globally: global, pinned_until: pinned_until ) Jobs.cancel_scheduled_job(:unpin_topic, topic_id: self.id) Jobs.enqueue_at(pinned_until, :unpin_topic, topic_id: self.id) if pinned_until end def draft_key "#{Draft::EXISTING_TOPIC}#{id}" end def notifier @topic_notifier ||= TopicNotifier.new(self) end def muted?(user) if user && user.id notifier.muted?(user.id) end end def self.ensure_consistency! # unpin topics that might have been missed Topic.where("pinned_until < now()").update_all(pinned_at: nil, pinned_globally: false, pinned_until: nil) end def public_topic_timer @public_topic_timer ||= topic_timers.find_by(deleted_at: nil, public_type: true) end def private_topic_timer(user) @private_topic_Timer ||= topic_timers.find_by(deleted_at: nil, public_type: false, user_id: user.id) end def delete_topic_timer(status_type, by_user: Discourse.system_user) options = { status_type: status_type } options.merge!(user: by_user) unless TopicTimer.public_types[status_type] self.topic_timers.find_by(options)&.trash!(by_user) nil end # Valid arguments for the time: # * An integer, which is the number of hours from now to update the topic's status. # * A timestamp, like "2013-11-25 13:00", when the topic's status should update. # * A timestamp with timezone in JSON format. (e.g., "2013-11-26T21:00:00.000Z") # * `nil` to delete the topic's status update. # Options: # * by_user: User who is setting the topic's status update. # * based_on_last_post: True if time should be based on timestamp of the last post. # * category_id: Category that the update will apply to. def set_or_create_timer(status_type, time, by_user: nil, based_on_last_post: false, category_id: SiteSetting.uncategorized_category_id) return delete_topic_timer(status_type, by_user: by_user) if time.blank? public_topic_timer = !!TopicTimer.public_types[status_type] topic_timer_options = { topic: self, public_type: public_topic_timer } topic_timer_options.merge!(user: by_user) unless public_topic_timer topic_timer = TopicTimer.find_or_initialize_by(topic_timer_options) topic_timer.status_type = status_type time_now = Time.zone.now topic_timer.based_on_last_post = !based_on_last_post.blank? if status_type == TopicTimer.types[:publish_to_category] topic_timer.category = Category.find_by(id: category_id) end if topic_timer.based_on_last_post num_hours = time.to_f if num_hours > 0 last_post_created_at = self.ordered_posts.last.present? ? self.ordered_posts.last.created_at : time_now topic_timer.execute_at = last_post_created_at + num_hours.hours topic_timer.created_at = last_post_created_at end else utc = Time.find_zone("UTC") is_float = (Float(time) rescue nil) if is_float num_hours = time.to_f topic_timer.execute_at = num_hours.hours.from_now if num_hours > 0 else timestamp = utc.parse(time) raise Discourse::InvalidParameters unless timestamp # a timestamp in client's time zone, like "2015-5-27 12:00" topic_timer.execute_at = timestamp topic_timer.errors.add(:execute_at, :invalid) if timestamp < utc.now end end if topic_timer.execute_at if by_user&.staff? || by_user&.trust_level == TrustLevel[4] topic_timer.user = by_user else topic_timer.user ||= (self.user.staff? || self.user.trust_level == TrustLevel[4] ? self.user : Discourse.system_user) end if self.persisted? topic_timer.save! else self.topic_timers << topic_timer end topic_timer end end def read_restricted_category? category && category.read_restricted end def acting_user @acting_user || user end def acting_user=(u) @acting_user = u end def secure_group_ids @secure_group_ids ||= if self.category && self.category.read_restricted? self.category.secure_group_ids end end def has_topic_embed? TopicEmbed.where(topic_id: id).exists? end def expandable_first_post? SiteSetting.embed_truncate? && has_topic_embed? end def message_archived?(user) return false unless user && user.id # tricky query but this checks to see if message is archived for ALL groups you belong to # OR if you have it archived as a user explicitly sql = <<~SQL SELECT 1 WHERE ( SELECT count(*) FROM topic_allowed_groups tg JOIN group_archived_messages gm ON gm.topic_id = tg.topic_id AND gm.group_id = tg.group_id WHERE tg.group_id IN (SELECT g.group_id FROM group_users g WHERE g.user_id = :user_id) AND tg.topic_id = :topic_id ) = ( SELECT case when count(*) = 0 then -1 else count(*) end FROM topic_allowed_groups tg WHERE tg.group_id IN (SELECT g.group_id FROM group_users g WHERE g.user_id = :user_id) AND tg.topic_id = :topic_id ) UNION ALL SELECT 1 FROM topic_allowed_users tu JOIN user_archived_messages um ON um.user_id = tu.user_id AND um.topic_id = tu.topic_id WHERE tu.user_id = :user_id AND tu.topic_id = :topic_id SQL DB.exec(sql, user_id: user.id, topic_id: id) > 0 end TIME_TO_FIRST_RESPONSE_SQL ||= <<-SQL SELECT AVG(t.hours)::float AS "hours", t.created_at AS "date" FROM ( SELECT t.id, t.created_at::date AS created_at, EXTRACT(EPOCH FROM MIN(p.created_at) - t.created_at)::float / 3600.0 AS "hours" FROM topics t LEFT JOIN posts p ON p.topic_id = t.id /*where*/ GROUP BY t.id ) t GROUP BY t.created_at ORDER BY t.created_at SQL TIME_TO_FIRST_RESPONSE_TOTAL_SQL ||= <<-SQL SELECT AVG(t.hours)::float AS "hours" FROM ( SELECT t.id, EXTRACT(EPOCH FROM MIN(p.created_at) - t.created_at)::float / 3600.0 AS "hours" FROM topics t LEFT JOIN posts p ON p.topic_id = t.id /*where*/ GROUP BY t.id ) t SQL def self.time_to_first_response(sql, opts = nil) opts ||= {} builder = DB.build(sql) builder.where("t.created_at >= :start_date", start_date: opts[:start_date]) if opts[:start_date] builder.where("t.created_at < :end_date", end_date: opts[:end_date]) if opts[:end_date] builder.where(IN_CATEGORY_AND_SUBCATEGORIES_SQL, category_id: opts[:category_id]) if opts[:category_id] builder.where("t.archetype <> '#{Archetype.private_message}'") builder.where("t.deleted_at IS NULL") builder.where("p.deleted_at IS NULL") builder.where("p.post_number > 1") builder.where("p.user_id != t.user_id") builder.where("p.user_id in (:user_ids)", user_ids: opts[:user_ids]) if opts[:user_ids] builder.where("p.post_type = :post_type", post_type: Post.types[:regular]) builder.where("EXTRACT(EPOCH FROM p.created_at - t.created_at) > 0") builder.query_hash end def self.time_to_first_response_per_day(start_date, end_date, opts = {}) time_to_first_response(TIME_TO_FIRST_RESPONSE_SQL, opts.merge(start_date: start_date, end_date: end_date)) end def self.time_to_first_response_total(opts = nil) total = time_to_first_response(TIME_TO_FIRST_RESPONSE_TOTAL_SQL, opts) total.first["hours"].to_f.round(2) end WITH_NO_RESPONSE_SQL ||= <<-SQL SELECT COUNT(*) as count, tt.created_at AS "date" FROM ( SELECT t.id, t.created_at::date AS created_at, MIN(p.post_number) first_reply FROM topics t LEFT JOIN posts p ON p.topic_id = t.id AND p.user_id != t.user_id AND p.deleted_at IS NULL AND p.post_type = #{Post.types[:regular]} /*where*/ GROUP BY t.id ) tt WHERE tt.first_reply IS NULL OR tt.first_reply < 2 GROUP BY tt.created_at ORDER BY tt.created_at SQL def self.with_no_response_per_day(start_date, end_date, category_id = nil) builder = DB.build(WITH_NO_RESPONSE_SQL) builder.where("t.created_at >= :start_date", start_date: start_date) if start_date builder.where("t.created_at < :end_date", end_date: end_date) if end_date builder.where(IN_CATEGORY_AND_SUBCATEGORIES_SQL, category_id: category_id) if category_id builder.where("t.archetype <> '#{Archetype.private_message}'") builder.where("t.deleted_at IS NULL") builder.query_hash end WITH_NO_RESPONSE_TOTAL_SQL ||= <<-SQL SELECT COUNT(*) as count FROM ( SELECT t.id, MIN(p.post_number) first_reply FROM topics t LEFT JOIN posts p ON p.topic_id = t.id AND p.user_id != t.user_id AND p.deleted_at IS NULL AND p.post_type = #{Post.types[:regular]} /*where*/ GROUP BY t.id ) tt WHERE tt.first_reply IS NULL OR tt.first_reply < 2 SQL def self.with_no_response_total(opts = {}) builder = DB.build(WITH_NO_RESPONSE_TOTAL_SQL) builder.where(IN_CATEGORY_AND_SUBCATEGORIES_SQL, category_id: opts[:category_id]) if opts[:category_id] builder.where("t.archetype <> '#{Archetype.private_message}'") builder.where("t.deleted_at IS NULL") builder.query_single.first.to_i end def convert_to_public_topic(user) public_topic = TopicConverter.new(self, user).convert_to_public_topic add_small_action(user, "public_topic") if public_topic public_topic end def convert_to_private_message(user) private_topic = TopicConverter.new(self, user).convert_to_private_message add_small_action(user, "private_topic") if private_topic private_topic end def pm_with_non_human_user? sql = <<~SQL SELECT 1 FROM topics LEFT JOIN topic_allowed_groups ON topics.id = topic_allowed_groups.topic_id WHERE topic_allowed_groups.topic_id IS NULL AND topics.archetype = :private_message AND topics.id = :topic_id AND ( SELECT COUNT(*) FROM topic_allowed_users WHERE topic_allowed_users.topic_id = :topic_id AND topic_allowed_users.user_id > 0 ) = 1 SQL result = DB.exec(sql, private_message: Archetype.private_message, topic_id: self.id) result != 0 end def featured_link_root_domain MiniSuffix.domain(URI.parse(URI.encode(self.featured_link)).hostname) end def self.private_message_topics_count_per_day(start_date, end_date, topic_subtype) private_messages .with_subtype(topic_subtype) .where('topics.created_at >= ? AND topics.created_at <= ?', start_date, end_date) .group('date(topics.created_at)') .order('date(topics.created_at)') .count end def is_category_topic? @is_category_topic ||= Category.exists?(topic_id: self.id.to_i) end def reset_bumped_at post = ordered_posts.where( user_deleted: false, hidden: false, post_type: Post.types[:regular] ).last || first_post update!(bumped_at: post.created_at) end def auto_close_threshold_reached? return if user&.staff? scores = ReviewableScore.pending .joins(:reviewable) .where("reviewables.topic_id = ?", self.id) .pluck("COUNT(DISTINCT reviewable_scores.user_id), COALESCE(SUM(reviewable_scores.score), 0.0)") .first scores[0] >= SiteSetting.num_flaggers_to_close_topic && scores[1] >= SiteSetting.score_to_auto_close_topic end private def invite_to_private_message(invited_by, target_user, guardian) if !guardian.can_send_private_message?(target_user) raise UserExists.new(I18n.t( "activerecord.errors.models.topic.attributes.base.cant_send_pm" )) end Topic.transaction do rate_limit_topic_invitation(invited_by) topic_allowed_users.create!(user_id: target_user.id) unless topic_allowed_users.exists?(user_id: target_user.id) add_small_action(invited_by, "invited_user", target_user.username) create_invite_notification!( target_user, Notification.types[:invited_to_private_message], invited_by.username ) end end def invite_to_topic(invited_by, target_user, group_ids, guardian) Topic.transaction do rate_limit_topic_invitation(invited_by) if group_ids ( self.category.groups.where(id: group_ids).where(automatic: false) - target_user.groups.where(automatic: false) ).each do |group| if guardian.can_edit_group?(group) group.add(target_user) GroupActionLogger .new(invited_by, group) .log_add_user_to_group(target_user) end end end if Guardian.new(target_user).can_see_topic?(self) create_invite_notification!( target_user, Notification.types[:invited_to_topic], invited_by.username ) end end end def update_category_topic_count_by(num) if category_id.present? Category.where(['id = ?', category_id]).update_all("topic_count = topic_count " + (num > 0 ? '+' : '') + "#{num}") end end def limit_first_day_topics_per_day apply_per_day_rate_limit_for("first-day-topics", :max_topics_in_first_day) end def apply_per_day_rate_limit_for(key, method_name) RateLimiter.new(user, "#{key}-per-day", SiteSetting.send(method_name), 1.day.to_i) end def create_invite_notification!(target_user, notification_type, username) target_user.notifications.create!( notification_type: notification_type, topic_id: self.id, post_number: 1, data: { topic_title: self.title, display_username: username }.to_json ) end def rate_limit_topic_invitation(invited_by) RateLimiter.new( invited_by, "topic-invitations-per-day", SiteSetting.max_topic_invitations_per_day, 1.day.to_i ).performed! true end end # == Schema Information # # Table name: topics # # id :integer not null, primary key # title :string not null # last_posted_at :datetime # created_at :datetime not null # updated_at :datetime not null # views :integer default(0), not null # posts_count :integer default(0), not null # user_id :integer # last_post_user_id :integer not null # reply_count :integer default(0), not null # featured_user1_id :integer # featured_user2_id :integer # featured_user3_id :integer # avg_time :integer # deleted_at :datetime # highest_post_number :integer default(0), not null # image_url :string # like_count :integer default(0), not null # incoming_link_count :integer default(0), not null # category_id :integer # visible :boolean default(TRUE), not null # moderator_posts_count :integer default(0), not null # closed :boolean default(FALSE), not null # archived :boolean default(FALSE), not null # bumped_at :datetime not null # has_summary :boolean default(FALSE), not null # archetype :string default("regular"), not null # featured_user4_id :integer # notify_moderators_count :integer default(0), not null # spam_count :integer default(0), not null # pinned_at :datetime # score :float # percent_rank :float default(1.0), not null # subtype :string # slug :string # deleted_by_id :integer # participant_count :integer default(1) # word_count :integer # excerpt :string(1000) # pinned_globally :boolean default(FALSE), not null # pinned_until :datetime # fancy_title :string(400) # highest_staff_post_number :integer default(0), not null # featured_link :string # reviewable_score :float default(0.0), not null # # Indexes # # idx_topics_front_page (deleted_at,visible,archetype,category_id,id) # idx_topics_user_id_deleted_at (user_id) WHERE (deleted_at IS NULL) # idxtopicslug (slug) WHERE ((deleted_at IS NULL) AND (slug IS NOT NULL)) # index_topics_on_bumped_at (bumped_at) # index_topics_on_created_at_and_visible (created_at,visible) WHERE ((deleted_at IS NULL) AND ((archetype)::text <> 'private_message'::text)) # index_topics_on_id_and_deleted_at (id,deleted_at) # index_topics_on_lower_title (lower((title)::text)) # index_topics_on_pinned_at (pinned_at) WHERE (pinned_at IS NOT NULL) # index_topics_on_pinned_globally (pinned_globally) WHERE pinned_globally # index_topics_on_updated_at_public (updated_at,visible,highest_staff_post_number,highest_post_number,category_id,created_at,id) WHERE (((archetype)::text <> 'private_message'::text) AND (deleted_at IS NULL)) #