require_dependency "concern/positionable" class Category < ActiveRecord::Base include Concern::Positionable belongs_to :topic, dependent: :destroy if rails4? belongs_to :topic_only_relative_url, -> { select "id, title, slug" }, class_name: "Topic", foreign_key: "topic_id" else belongs_to :topic_only_relative_url, select: "id, title, slug", class_name: "Topic", foreign_key: "topic_id" end belongs_to :user belongs_to :latest_post, class_name: "Post" has_many :topics has_many :category_featured_topics has_many :featured_topics, through: :category_featured_topics, source: :topic has_many :category_featured_users has_many :featured_users, through: :category_featured_users, source: :user has_many :category_groups has_many :groups, through: :category_groups validates :user_id, presence: true validates :name, presence: true, uniqueness: true, length: { in: 1..50 } validate :parent_category_validator before_validation :ensure_slug after_save :invalidate_site_cache before_save :apply_permissions after_create :create_category_definition after_create :publish_categories_list after_destroy :invalidate_site_cache after_destroy :publish_categories_list has_one :category_search_data belongs_to :parent_category, class_name: 'Category' scope :latest, ->{ order('topic_count desc') } scope :secured, ->(guardian = nil) { ids = guardian.secure_category_ids if guardian if ids.present? where("NOT categories.read_restricted or categories.id in (:cats)", cats: ids).references(:categories) else where("NOT categories.read_restricted").references(:categories) end } scope :topic_create_allowed, ->(guardian) { if guardian.anonymous? where("1=0") else scoped_to_permissions(guardian, [:full]) end } scope :post_create_allowed, ->(guardian) { if guardian.anonymous? where("1=0") else scoped_to_permissions(guardian, [:create_post, :full]) end } delegate :post_template, to: 'self.class' # permission is just used by serialization # we may consider wrapping this in another spot attr_accessor :displayable_topics, :permission def self.scoped_to_permissions(guardian, permission_types) if guardian && guardian.is_staff? rails4? ? all : scoped else permission_types = permission_types.map{ |permission_type| CategoryGroup.permission_types[permission_type] } where("categories.id in ( SELECT c.id FROM categories c WHERE ( NOT c.read_restricted AND ( NOT EXISTS( SELECT 1 FROM category_groups cg WHERE cg.category_id = categories.id ) ) OR EXISTS( SELECT 1 FROM category_groups cg WHERE permission_type in (?) AND cg.category_id = categories.id AND group_id IN ( SELECT g.group_id FROM group_users g where g.user_id = ? UNION SELECT ? ) ) ) )", permission_types,(!guardian || guardian.user.blank?) ? -1 : guardian.user.id, Group[:everyone].id) end end # Internal: Update category stats: # of topics in past year, month, week for # all categories. def self.update_stats topics = Topic .select("COUNT(*) topic_count") .where("topics.category_id = categories.id") .where("categories.topic_id <> topics.id") .visible topics_with_post_count = Topic .select("topics.category_id, COUNT(*) topic_count, SUM(topics.posts_count) post_count") .where("topics.id NOT IN (select cc.topic_id from categories cc WHERE topic_id IS NOT NULL)") .group("topics.category_id") .visible.to_sql topics_year = topics.created_since(1.year.ago).to_sql topics_month = topics.created_since(1.month.ago).to_sql topics_week = topics.created_since(1.week.ago).to_sql Category.exec_sql < x.topic_count OR c.post_count <> x.post_count) SQL # TODO don't update unchanged data Category.update_all("topics_year = (#{topics_year}), topics_month = (#{topics_month}), topics_week = (#{topics_week})") end # Internal: Generate the text of post prompting to enter category # description. def self.post_template I18n.t("category.post_template", replace_paragraph: I18n.t("category.replace_paragraph")) end def create_category_definition t = Topic.new(title: I18n.t("category.topic_prefix", category: name), user: user, pinned_at: Time.now, category_id: id) t.skip_callbacks = true t.save! update_column(:topic_id, t.id) t.posts.create(raw: post_template, user: user) end def topic_url topic_only_relative_url.try(:relative_url) end def ensure_slug if name.present? self.name.strip! self.slug = Slug.for(name) return if self.slug.blank? # If a category with that slug already exists, set the slug to nil so the category can be found # another way. category = Category.where(slug: self.slug) category = category.where("id != ?", id) if id.present? self.slug = '' if category.exists? end end # Categories are cached in the site json, so the caches need to be # invalidated whenever the category changes. def invalidate_site_cache Site.invalidate_cache end def publish_categories_list MessageBus.publish('/categories', {categories: ActiveModel::ArraySerializer.new(Category.latest).as_json}) end def parent_category_validator if parent_category_id errors.add(:parent_category_id, I18n.t("category.errors.self_parent")) if parent_category_id == id grandfather_id = Category.where(id: parent_category_id).pluck(:parent_category_id).first errors.add(:base, I18n.t("category.errors.depth")) if grandfather_id end end def group_names=(names) # this line bothers me, destroying in AR can not seem to be queued, thinking of extending it category_groups.destroy_all unless new_record? ids = Group.where(name: names.split(",")).pluck(:id) ids.each do |id| category_groups.build(group_id: id) end end # will reset permission on a topic to a particular # set. # # Available permissions are, :full, :create_post, :readonly # hash can be: # # :everyone => :full - everyone has everything # :everyone => :readonly, :staff => :full # 7 => 1 # you can pass a group_id and permission id def set_permissions(permissions) self.read_restricted, @permissions = Category.resolve_permissions(permissions) # Ideally we can just call .clear here, but it runs SQL, we only want to run it # on save. end def permissions=(permissions) set_permissions(permissions) end def apply_permissions if @permissions category_groups.destroy_all @permissions.each do |group_id, permission_type| category_groups.build(group_id: group_id, permission_type: permission_type) end @permissions = nil end end def secure_group_ids if self.read_restricted? groups.pluck("groups.id") end end def update_latest latest_post_id = Post .order("posts.created_at desc") .where("NOT hidden") .joins("join topics on topics.id = topic_id") .where("topics.category_id = :id", id: self.id) .limit(1) .pluck("posts.id") .first latest_topic_id = Topic .order("topics.created_at desc") .where("visible") .where("topics.category_id = :id", id: self.id) .limit(1) .pluck("topics.id") .first self.update_attributes(latest_topic_id: latest_topic_id, latest_post_id: latest_post_id) end def self.resolve_permissions(permissions) read_restricted = true everyone = Group::AUTO_GROUPS[:everyone] full = CategoryGroup.permission_types[:full] mapped = permissions.map do |group,permission| group = group.id if Group === group # subtle, using Group[] ensures the group exists in the DB group = Group[group.to_sym].id unless Fixnum === group permission = CategoryGroup.permission_types[permission] unless Fixnum === permission [group, permission] end mapped.each do |group, permission| if group == everyone && permission == full return [false, []] end read_restricted = false if group == everyone end [read_restricted, mapped] end end # == Schema Information # # Table name: categories # # id :integer not null, primary key # name :string(50) not null # color :string(6) default("AB9364"), not null # topic_id :integer # topic_count :integer default(0), not null # created_at :datetime not null # updated_at :datetime not null # user_id :integer not null # topics_year :integer # topics_month :integer # topics_week :integer # slug :string(255) not null # description :text # text_color :string(6) default("FFFFFF"), not null # hotness :float default(5.0), not null # read_restricted :boolean default(FALSE), not null # auto_close_days :float # # Indexes # # index_categories_on_forum_thread_count (topic_count) # index_categories_on_name (name) UNIQUE #