648 lines
22 KiB
Ruby
648 lines
22 KiB
Ruby
# frozen_string_literal: true
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module DiscourseTagging
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TAGS_FIELD_NAME ||= "tags"
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TAGS_FILTER_REGEXP ||= /[\/\?#\[\]@!\$&'\(\)\*\+,;=\.%\\`^\s|\{\}"<>]+/ # /?#[]@!$&'()*+,;=.%\`^|{}"<>
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TAGS_STAFF_CACHE_KEY ||= "staff_tag_names"
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TAG_GROUP_TAG_IDS_SQL ||= <<-SQL
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SELECT tag_id
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FROM tag_group_memberships tgm
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INNER JOIN tag_groups tg
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ON tgm.tag_group_id = tg.id
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SQL
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def self.term_types
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@term_types ||= Enum.new(contains: 0, starts_with: 1)
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end
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def self.tag_topic_by_names(topic, guardian, tag_names_arg, append: false)
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if guardian.can_tag?(topic)
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tag_names = DiscourseTagging.tags_for_saving(tag_names_arg, guardian) || []
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if !tag_names.empty?
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Tag.where_name(tag_names).joins(:target_tag).includes(:target_tag).each do |tag|
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tag_names[tag_names.index(tag.name)] = tag.target_tag.name
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end
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end
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# tags currently on the topic
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old_tag_names = topic.tags.pluck(:name) || []
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# tags we're trying to add to the topic
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new_tag_names = tag_names - old_tag_names
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# tag names being removed from the topic
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removed_tag_names = old_tag_names - tag_names
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# tag names which are visible, but not usable, by *some users*
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readonly_tags = DiscourseTagging.readonly_tag_names(guardian)
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# tags names which are not visible or usable by this user
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hidden_tags = DiscourseTagging.hidden_tag_names(guardian)
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# tag names which ARE permitted by *this user*
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permitted_tags = DiscourseTagging.permitted_tag_names(guardian)
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# If this user has explicit permission to use certain tags,
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# we need to ensure those tags are removed from the list of
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# restricted tags
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if permitted_tags.present?
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readonly_tags = readonly_tags - permitted_tags
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end
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# visible, but not usable, tags this user is trying to use
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disallowed_tags = new_tag_names & readonly_tags
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# hidden tags this user is trying to use
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disallowed_tags += new_tag_names & hidden_tags
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if disallowed_tags.present?
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topic.errors.add(:base, I18n.t("tags.restricted_tag_disallowed", tag: disallowed_tags.join(" ")))
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return false
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end
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removed_readonly_tags = removed_tag_names & readonly_tags
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if removed_readonly_tags.present?
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topic.errors.add(:base, I18n.t("tags.restricted_tag_remove_disallowed", tag: removed_readonly_tags.join(" ")))
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return false
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end
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tag_names += removed_tag_names & hidden_tags
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category = topic.category
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tag_names = tag_names + old_tag_names if append
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if tag_names.present?
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# guardian is explicitly nil cause we don't want to strip all
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# staff tags that already passed validation
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tags = filter_allowed_tags(
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nil, # guardian
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for_topic: true,
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category: category,
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selected_tags: tag_names,
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only_tag_names: tag_names
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)
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# keep existent tags that current user cannot use
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tags += Tag.where(name: old_tag_names & tag_names)
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tags = Tag.where(id: tags.map(&:id)).all.to_a if tags.size > 0
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if tags.size < tag_names.size && (category.nil? || category.allow_global_tags || (category.tags.count == 0 && category.tag_groups.count == 0))
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tag_names.each do |name|
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unless Tag.where_name(name).exists?
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tags << Tag.create(name: name)
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end
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end
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end
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# add missing mandatory parent tags
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tag_ids = tags.map(&:id)
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parent_tags_map = DB.query("
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SELECT tgm.tag_id, tg.parent_tag_id
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FROM tag_groups tg
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INNER JOIN tag_group_memberships tgm
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ON tgm.tag_group_id = tg.id
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WHERE tg.parent_tag_id IS NOT NULL
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AND tgm.tag_id IN (?)
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", tag_ids).inject({}) do |h, v|
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h[v.tag_id] ||= []
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h[v.tag_id] << v.parent_tag_id
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h
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end
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missing_parent_tag_ids = parent_tags_map.map do |_, parent_tag_ids|
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(tag_ids & parent_tag_ids).size == 0 ? parent_tag_ids.first : nil
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end.compact.uniq
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unless missing_parent_tag_ids.empty?
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tags = tags + Tag.where(id: missing_parent_tag_ids).all
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end
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return false unless validate_min_required_tags_for_category(guardian, topic, category, tags)
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return false unless validate_required_tags_from_group(guardian, topic, category, tags)
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if tags.size == 0
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topic.errors.add(:base, I18n.t("tags.forbidden.invalid", count: new_tag_names.size))
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return false
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end
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topic.tags = tags
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else
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return false unless validate_min_required_tags_for_category(guardian, topic, category)
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return false unless validate_required_tags_from_group(guardian, topic, category)
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topic.tags = []
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end
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topic.tags_changed = true
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DiscourseEvent.trigger(
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:topic_tags_changed,
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topic, old_tag_names: old_tag_names, new_tag_names: topic.tags.map(&:name)
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)
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return true
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end
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false
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end
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def self.validate_min_required_tags_for_category(guardian, model, category, tags = [])
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if !guardian.is_staff? &&
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category &&
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category.minimum_required_tags > 0 &&
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tags.length < category.minimum_required_tags
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model.errors.add(:base, I18n.t("tags.minimum_required_tags", count: category.minimum_required_tags))
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false
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else
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true
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end
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end
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def self.validate_required_tags_from_group(guardian, model, category, tags = [])
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return true if guardian.is_staff? || category.nil?
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success = true
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category.category_required_tag_groups.each do |crtg|
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if tags.length < crtg.min_count ||
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crtg.tag_group.tags.where("tags.id in (?)", tags.map(&:id)).count < crtg.min_count
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success = false
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model.errors.add(:base,
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I18n.t(
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"tags.required_tags_from_group",
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count: crtg.min_count,
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tag_group_name: crtg.tag_group.name,
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tags: crtg.tag_group.tags.order(:id).pluck(:name).join(", ")
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)
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)
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end
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end
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success
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end
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def self.validate_category_restricted_tags(guardian, model, category, tags = [])
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return true if tags.blank? || category.blank?
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tags = tags.map(&:name) if Tag === tags[0]
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tags_restricted_to_categories = Hash.new { |h, k| h[k] = Set.new }
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query = Tag.where(name: tags)
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query.joins(tag_groups: :categories).pluck(:name, 'categories.id').each do |(tag, cat_id)|
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tags_restricted_to_categories[tag] << cat_id
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end
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query.joins(:categories).pluck(:name, 'categories.id').each do |(tag, cat_id)|
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tags_restricted_to_categories[tag] << cat_id
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end
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unallowed_tags = tags_restricted_to_categories.keys.select do |tag|
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!tags_restricted_to_categories[tag].include?(category.id)
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end
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if unallowed_tags.present?
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msg = I18n.t(
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"tags.forbidden.restricted_tags_cannot_be_used_in_category",
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count: unallowed_tags.size,
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tags: unallowed_tags.sort.join(", "),
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category: category.name
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)
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model.errors.add(:base, msg)
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return false
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end
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if !category.allow_global_tags && category.has_restricted_tags?
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unrestricted_tags = tags - tags_restricted_to_categories.keys
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if unrestricted_tags.present?
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msg = I18n.t(
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"tags.forbidden.category_does_not_allow_tags",
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count: unrestricted_tags.size,
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tags: unrestricted_tags.sort.join(", "),
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category: category.name
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)
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model.errors.add(:base, msg)
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return false
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end
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end
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true
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end
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TAG_GROUP_RESTRICTIONS_SQL ||= <<~SQL
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tag_group_restrictions AS (
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SELECT t.id as tag_id, tgm.id as tgm_id, tg.id as tag_group_id, tg.parent_tag_id as parent_tag_id,
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tg.one_per_topic as one_per_topic
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FROM tags t
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LEFT OUTER JOIN tag_group_memberships tgm ON tgm.tag_id = t.id /*and_name_like*/
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LEFT OUTER JOIN tag_groups tg ON tg.id = tgm.tag_group_id
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)
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SQL
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CATEGORY_RESTRICTIONS_SQL ||= <<~SQL
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category_restrictions AS (
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SELECT t.id as tag_id, ct.id as ct_id, ct.category_id as category_id
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FROM tags t
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INNER JOIN category_tags ct ON t.id = ct.tag_id /*and_name_like*/
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UNION
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SELECT t.id as tag_id, ctg.id as ctg_id, ctg.category_id as category_id
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FROM tags t
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INNER JOIN tag_group_memberships tgm ON tgm.tag_id = t.id /*and_name_like*/
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INNER JOIN category_tag_groups ctg ON tgm.tag_group_id = ctg.tag_group_id
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)
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SQL
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PERMITTED_TAGS_SQL ||= <<~SQL
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permitted_tag_groups AS (
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SELECT tg.id as tag_group_id, tgp.group_id as group_id, tgp.permission_type as permission_type
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FROM tags t
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INNER JOIN tag_group_memberships tgm ON tgm.tag_id = t.id /*and_name_like*/
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INNER JOIN tag_groups tg ON tg.id = tgm.tag_group_id
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INNER JOIN tag_group_permissions tgp
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ON tg.id = tgp.tag_group_id /*and_group_ids*/
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AND tgp.permission_type = #{TagGroupPermission.permission_types[:full]}
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)
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SQL
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# Options:
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# term: a search term to filter tags by name
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# term_type: whether to search by "starts_with" or "contains" with the term
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# limit: max number of results
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# category: a Category to which the object being tagged belongs
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# for_input: result is for an input field, so only show permitted tags
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# for_topic: results are for tagging a topic
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# selected_tags: an array of tag names that are in the current selection
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# only_tag_names: limit results to tags with these names
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# exclude_synonyms: exclude synonyms from results
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# order_search_results: result should be ordered for name search results
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# order_popularity: order result by topic_count
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# excluded_tag_names: an array of tag names not to include in the results
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def self.filter_allowed_tags(guardian, opts = {})
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selected_tag_ids = opts[:selected_tags] ? Tag.where_name(opts[:selected_tags]).pluck(:id) : []
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category = opts[:category]
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category_has_restricted_tags = category ? (category.tags.count > 0 || category.tag_groups.count > 0) : false
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# If guardian is nil, it means the caller doesn't want tags to be filtered
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# based on guardian rules. Use the same rules as for staff users.
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filter_for_non_staff = !guardian.nil? && !guardian.is_staff?
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builder_params = {}
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unless selected_tag_ids.empty?
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builder_params[:selected_tag_ids] = selected_tag_ids
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end
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sql = +"WITH #{TAG_GROUP_RESTRICTIONS_SQL}, #{CATEGORY_RESTRICTIONS_SQL}"
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if (opts[:for_input] || opts[:for_topic]) && filter_for_non_staff
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sql << ", #{PERMITTED_TAGS_SQL} "
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builder_params[:group_ids] = permitted_group_ids(guardian)
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sql.gsub!("/*and_group_ids*/", "AND group_id IN (:group_ids)")
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end
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outer_join = category.nil? || category.allow_global_tags || !category_has_restricted_tags
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distinct_clause = if opts[:order_popularity]
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"DISTINCT ON (topic_count, name)"
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elsif opts[:order_search_results] && opts[:term].present?
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"DISTINCT ON (lower(name) = lower(:cleaned_term), topic_count, name)"
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else
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""
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end
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sql << <<~SQL
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SELECT #{distinct_clause} t.id, t.name, t.topic_count, t.pm_topic_count, t.description,
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tgr.tgm_id as tgm_id, tgr.tag_group_id as tag_group_id, tgr.parent_tag_id as parent_tag_id,
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tgr.one_per_topic as one_per_topic, t.target_tag_id
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FROM tags t
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INNER JOIN tag_group_restrictions tgr ON tgr.tag_id = t.id
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#{outer_join ? "LEFT OUTER" : "INNER"}
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JOIN category_restrictions cr ON t.id = cr.tag_id
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/*where*/
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/*order_by*/
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/*limit*/
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SQL
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builder = DB.build(sql)
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if !opts[:for_topic] && builder_params[:selected_tag_ids]
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builder.where("id NOT IN (:selected_tag_ids)")
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end
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if opts[:only_tag_names]
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builder.where("LOWER(name) IN (:only_tag_names)")
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builder_params[:only_tag_names] = opts[:only_tag_names].map(&:downcase)
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end
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# parent tag requirements
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if opts[:for_input]
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builder.where(
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builder_params[:selected_tag_ids] ?
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"tgm_id IS NULL OR parent_tag_id IS NULL OR parent_tag_id IN (:selected_tag_ids)" :
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"tgm_id IS NULL OR parent_tag_id IS NULL"
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)
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end
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if category && category_has_restricted_tags
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builder.where(
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category.allow_global_tags ? "category_id = ? OR category_id IS NULL" : "category_id = ?",
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category.id
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)
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elsif category || opts[:for_input] || opts[:for_topic]
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# tags not restricted to any categories
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builder.where("category_id IS NULL")
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end
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if filter_for_non_staff && (opts[:for_input] || opts[:for_topic])
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# exclude staff-only tag groups
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builder.where("tag_group_id IS NULL OR tag_group_id IN (SELECT tag_group_id FROM permitted_tag_groups)")
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end
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term = opts[:term]
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if term.present?
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term = term.gsub("_", "\\_").downcase
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builder_params[:cleaned_term] = term
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if opts[:term_type] == DiscourseTagging.term_types[:starts_with]
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builder_params[:term] = "#{term}%"
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else
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builder_params[:term] = "%#{term}%"
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end
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builder.where("LOWER(name) LIKE :term")
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sql.gsub!("/*and_name_like*/", "AND LOWER(t.name) LIKE :term")
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else
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sql.gsub!("/*and_name_like*/", "")
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end
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# show required tags for non-staff
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# or for staff when
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# - there are more available tags than the query limit
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# - and no search term has been included
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required_tag_ids = nil
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required_category_tag_group = nil
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if opts[:for_input] && category&.category_required_tag_groups.present? && (filter_for_non_staff || term.blank?)
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category.category_required_tag_groups.each do |crtg|
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group_tags = crtg.tag_group.tags.pluck(:id)
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next if (group_tags & selected_tag_ids).size >= crtg.min_count
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if filter_for_non_staff || group_tags.size >= opts[:limit].to_i
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required_category_tag_group = crtg
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required_tag_ids = group_tags
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builder.where("id IN (?)", required_tag_ids)
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end
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break
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end
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end
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if filter_for_non_staff
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group_ids = permitted_group_ids(guardian)
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builder.where(<<~SQL, group_ids, group_ids)
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id NOT IN (
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(SELECT tgm.tag_id
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FROM tag_group_permissions tgp
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INNER JOIN tag_groups tg ON tgp.tag_group_id = tg.id
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INNER JOIN tag_group_memberships tgm ON tg.id = tgm.tag_group_id
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WHERE tgp.group_id NOT IN (?))
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EXCEPT
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(SELECT tgm.tag_id
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FROM tag_group_permissions tgp
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INNER JOIN tag_groups tg ON tgp.tag_group_id = tg.id
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INNER JOIN tag_group_memberships tgm ON tg.id = tgm.tag_group_id
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WHERE tgp.group_id IN (?))
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)
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SQL
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end
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if builder_params[:selected_tag_ids] && (opts[:for_input] || opts[:for_topic])
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one_tag_per_group_ids = DB.query(<<~SQL, builder_params[:selected_tag_ids]).map(&:id)
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SELECT DISTINCT(tg.id)
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FROM tag_groups tg
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INNER JOIN tag_group_memberships tgm ON tg.id = tgm.tag_group_id AND tgm.tag_id IN (?)
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WHERE tg.one_per_topic
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SQL
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if !one_tag_per_group_ids.empty?
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builder.where(
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"tag_group_id IS NULL OR tag_group_id NOT IN (?) OR id IN (:selected_tag_ids)",
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one_tag_per_group_ids
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)
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end
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end
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if opts[:exclude_synonyms]
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builder.where("target_tag_id IS NULL")
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end
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if opts[:exclude_has_synonyms]
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builder.where("id NOT IN (SELECT target_tag_id FROM tags WHERE target_tag_id IS NOT NULL)")
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end
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if opts[:excluded_tag_names]&.any?
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builder.where("name NOT IN (?)", opts[:excluded_tag_names])
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end
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if opts[:limit]
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if required_tag_ids && term.blank?
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# override limit so all required tags are shown by default
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builder.limit(required_tag_ids.size)
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else
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builder.limit(opts[:limit])
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end
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end
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if opts[:order_popularity]
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builder.order_by("topic_count DESC, name")
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elsif opts[:order_search_results] && !term.blank?
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builder.order_by("lower(name) = lower(:cleaned_term) DESC, topic_count DESC, name")
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end
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result = builder.query(builder_params).uniq { |t| t.id }
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if opts[:with_context]
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context = {}
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if required_category_tag_group
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context[:required_tag_group] = {
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name: required_category_tag_group.tag_group.name,
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min_count: required_category_tag_group.min_count
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}
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end
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[result, context]
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else
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result
|
|
end
|
|
end
|
|
|
|
def self.visible_tags(guardian)
|
|
if guardian&.is_staff?
|
|
Tag.all
|
|
else
|
|
# Visible tags either have no permissions or have allowable permissions
|
|
Tag
|
|
.where.not(
|
|
id:
|
|
TagGroupMembership
|
|
.joins(tag_group: :tag_group_permissions)
|
|
.select(:tag_id)
|
|
)
|
|
.or(
|
|
Tag
|
|
.where(
|
|
id:
|
|
TagGroupPermission
|
|
.joins(tag_group: :tag_group_memberships)
|
|
.where(group_id: permitted_group_ids_query(guardian))
|
|
.select('tag_group_memberships.tag_id'),
|
|
)
|
|
)
|
|
end
|
|
end
|
|
|
|
def self.filter_visible(query, guardian = nil)
|
|
guardian&.is_staff? ? query : query.where(id: visible_tags(guardian).select(:id))
|
|
end
|
|
|
|
def self.hidden_tag_names(guardian = nil)
|
|
guardian&.is_staff? ? [] : Tag.where.not(id: visible_tags(guardian).select(:id)).pluck(:name)
|
|
end
|
|
|
|
def self.permitted_group_ids_query(guardian = nil)
|
|
if guardian&.authenticated?
|
|
Group
|
|
.from(
|
|
Group.sanitize_sql(
|
|
["(SELECT ? AS id UNION #{guardian.user.groups.select(:id).to_sql}) as groups", Group::AUTO_GROUPS[:everyone]]
|
|
)
|
|
)
|
|
.select(:id)
|
|
else
|
|
Group
|
|
.from(
|
|
Group.sanitize_sql(
|
|
["(SELECT ? AS id) AS groups", Group::AUTO_GROUPS[:everyone]]
|
|
)
|
|
)
|
|
.select(:id)
|
|
end
|
|
end
|
|
|
|
def self.permitted_group_ids(guardian = nil)
|
|
permitted_group_ids_query(guardian).pluck(:id)
|
|
end
|
|
|
|
# read-only tags for this user
|
|
def self.readonly_tag_names(guardian = nil)
|
|
return [] if guardian&.is_staff?
|
|
|
|
query = Tag.joins(tag_groups: :tag_group_permissions)
|
|
.where('tag_group_permissions.permission_type = ?',
|
|
TagGroupPermission.permission_types[:readonly])
|
|
|
|
query.pluck(:name)
|
|
end
|
|
|
|
# explicit permissions to use these tags
|
|
def self.permitted_tag_names(guardian = nil)
|
|
query =
|
|
Tag
|
|
.joins(tag_groups: :tag_group_permissions)
|
|
.where(
|
|
tag_group_permissions: {
|
|
group_id: permitted_group_ids(guardian),
|
|
permission_type: TagGroupPermission.permission_types[:full],
|
|
},
|
|
)
|
|
|
|
query.pluck(:name).uniq
|
|
end
|
|
|
|
# middle level of tag group restrictions
|
|
def self.staff_tag_names
|
|
tag_names = Discourse.cache.read(TAGS_STAFF_CACHE_KEY)
|
|
|
|
if !tag_names
|
|
tag_names =
|
|
Tag
|
|
.joins(tag_groups: :tag_group_permissions)
|
|
.where(
|
|
tag_group_permissions: {
|
|
group_id: Group::AUTO_GROUPS[:everyone],
|
|
permission_type: TagGroupPermission.permission_types[:readonly],
|
|
},
|
|
)
|
|
.pluck(:name)
|
|
Discourse.cache.write(TAGS_STAFF_CACHE_KEY, tag_names, expires_in: 1.hour)
|
|
end
|
|
|
|
tag_names
|
|
end
|
|
|
|
def self.clear_cache!
|
|
Discourse.cache.delete(TAGS_STAFF_CACHE_KEY)
|
|
end
|
|
|
|
def self.clean_tag(tag)
|
|
tag = tag.dup
|
|
tag.downcase! if SiteSetting.force_lowercase_tags
|
|
tag.strip!
|
|
tag.gsub!(/[[:space:]]+/, '-')
|
|
tag.gsub!(/[^[:word:][:punct:]]+/, '')
|
|
tag.squeeze!('-')
|
|
tag.gsub!(TAGS_FILTER_REGEXP, '')
|
|
tag[0...SiteSetting.max_tag_length]
|
|
end
|
|
|
|
def self.tags_for_saving(tags_arg, guardian, opts = {})
|
|
|
|
return [] unless guardian.can_tag_topics? && tags_arg.present?
|
|
|
|
tag_names = Tag.where_name(tags_arg).pluck(:name)
|
|
|
|
if guardian.can_create_tag?
|
|
tag_names += (tags_arg - tag_names).map { |t| clean_tag(t) }
|
|
tag_names.delete_if { |t| t.blank? }
|
|
tag_names.uniq!
|
|
end
|
|
|
|
opts[:unlimited] ? tag_names : tag_names[0...SiteSetting.max_tags_per_topic]
|
|
end
|
|
|
|
def self.add_or_create_tags_by_name(taggable, tag_names_arg, opts = {})
|
|
tag_names = DiscourseTagging.tags_for_saving(tag_names_arg, Guardian.new(Discourse.system_user), opts) || []
|
|
if taggable.tags.pluck(:name).sort != tag_names.sort
|
|
taggable.tags = Tag.where_name(tag_names).all
|
|
new_tag_names = taggable.tags.size < tag_names.size ? tag_names - taggable.tags.map(&:name) : []
|
|
taggable.tags << Tag.where(target_tag_id: taggable.tags.map(&:id)).all
|
|
new_tag_names.each do |name|
|
|
taggable.tags << Tag.create(name: name)
|
|
end
|
|
end
|
|
end
|
|
|
|
# Returns true if all were added successfully, or an Array of the
|
|
# tags that failed to be added, with errors on each Tag.
|
|
def self.add_or_create_synonyms_by_name(target_tag, synonym_names)
|
|
tag_names = DiscourseTagging.tags_for_saving(synonym_names, Guardian.new(Discourse.system_user)) || []
|
|
tag_names -= [target_tag.name]
|
|
existing = Tag.where_name(tag_names).all
|
|
target_tag.synonyms << existing
|
|
(tag_names - target_tag.synonyms.map(&:name)).each do |name|
|
|
target_tag.synonyms << Tag.create(name: name)
|
|
end
|
|
successful = existing.select { |t| !t.errors.present? }
|
|
synonyms_ids = successful.map(&:id)
|
|
TopicTag.where(topic_id: target_tag.topics.with_deleted, tag_id: synonyms_ids).delete_all
|
|
TopicTag.where(tag_id: synonyms_ids).update_all(tag_id: target_tag.id)
|
|
Scheduler::Defer.later "Update tag topic counts" do
|
|
Tag.ensure_consistency!
|
|
end
|
|
(existing - successful).presence || true
|
|
end
|
|
|
|
def self.muted_tags(user)
|
|
return [] unless user
|
|
TagUser.lookup(user, :muted).joins(:tag).pluck('tags.name')
|
|
end
|
|
end
|