#mixin for all guardian methods dealing with category permisions module CategoryGuardian # Creating Method def can_create_category?(parent=nil) is_admin? || ( SiteSetting.allow_moderators_to_create_categories && is_moderator? ) end # Editing Method def can_edit_category?(category) is_admin? || ( SiteSetting.allow_moderators_to_create_categories && is_moderator? && can_see_category?(category) ) end def can_delete_category?(category) can_edit_category?(category) && category.topic_count <= 0 && !category.uncategorized? && !category.has_children? end def cannot_delete_category_reason(category) return I18n.t('category.cannot_delete.uncategorized') if category.uncategorized? return I18n.t('category.cannot_delete.has_subcategories') if category.has_children? if category.topic_count != 0 oldest_topic = category.topics.where.not(id: category.topic_id).order('created_at ASC').limit(1).first if oldest_topic return I18n.t('category.cannot_delete.topic_exists', {count: category.topic_count, topic_link: "<a href=\"#{oldest_topic.url}\">#{oldest_topic.title}</a>"}) else # This is a weird case, probably indicating a bug. return I18n.t('category.cannot_delete.topic_exists_no_oldest', {count: category.topic_count}) end end nil end def can_see_category?(category) not(category.read_restricted) || secure_category_ids.include?(category.id) end def secure_category_ids @secure_category_ids ||= @user.secure_category_ids end # all allowed category ids def allowed_category_ids unrestricted = Category.where(read_restricted: false).pluck(:id) unrestricted.concat(secure_category_ids) end def topic_create_allowed_category_ids @topic_create_allowed_category_ids ||= @user.topic_create_allowed_category_ids end end