require_dependency 'enum' class Notification < ActiveRecord::Base belongs_to :user belongs_to :topic validates_presence_of :data validates_presence_of :notification_type scope :unread, lambda { where(read: false) } scope :recent, lambda { order('created_at desc').limit(10) } after_save :refresh_notification_count after_destroy :refresh_notification_count def self.ensure_consistency! Notification.exec_sql(" DELETE FROM Notifications n WHERE notification_type = :id AND NOT EXISTS( SELECT 1 FROM posts p JOIN topics t ON t.id = p.topic_id WHERE p.deleted_at is null AND t.deleted_at IS NULL AND p.post_number = n.post_number AND t.id = n.topic_id )" , id: Notification.types[:private_message]) end def self.types @types ||= Enum.new( :mentioned, :replied, :quoted, :edited, :liked, :private_message, :invited_to_private_message, :invitee_accepted, :posted, :moved_post ) end def self.mark_posts_read(user, topic_id, post_numbers) Notification.update_all "read = 't'", user_id: user.id, topic_id: topic_id, post_number: post_numbers, read: false end def self.interesting_after(min_date) result = where("created_at > ?", min_date) .includes(:topic) .unread .limit(20) .order("CASE WHEN notification_type = #{Notification.types[:replied]} THEN 1 WHEN notification_type = #{Notification.types[:mentioned]} THEN 2 ELSE 3 END, created_at DESC").to_a # Remove any duplicates by type and topic if result.present? seen = {} to_remove = Set.new result.each do |r| seen[r.notification_type] ||= Set.new if seen[r.notification_type].include?(r.topic_id) to_remove << r.id else seen[r.notification_type] << r.topic_id end end result.reject! {|r| to_remove.include?(r.id) } end result end # Be wary of calling this frequently. O(n) JSON parsing can suck. def data_hash @data_hash ||= begin return nil if data.blank? JSON.parse(data).with_indifferent_access end end def text_description link = block_given? ? yield : "" I18n.t("notification_types.#{Notification.types[notification_type]}", data_hash.merge(link: link)) end def url if topic.present? return topic.relative_url(post_number) end end def post return if topic_id.blank? || post_number.blank? Post.where(topic_id: topic_id, post_number: post_number).first end protected def refresh_notification_count user_id = user.id MessageBus.publish("/notification/#{user_id}", {unread_notifications: user.unread_notifications, unread_private_messages: user.unread_private_messages}, user_ids: [user_id] # only publish the notification to this user ) end end # == Schema Information # # Table name: notifications # # id :integer not null, primary key # notification_type :integer not null # user_id :integer not null # data :string(1000) not null # read :boolean default(FALSE), not null # created_at :datetime not null # updated_at :datetime not null # topic_id :integer # post_number :integer # post_action_id :integer # # Indexes # # index_notifications_on_post_action_id (post_action_id) # index_notifications_on_user_id_and_created_at (user_id,created_at) #