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 { |n=nil| n ||= 10; order('notifications.created_at desc').limit(n) } scope :visible , lambda { joins('LEFT JOIN topics ON notifications.topic_id = topics.id') .where('topics.id IS NULL OR topics.deleted_at IS NULL') } 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: 1, replied: 2, quoted: 3, edited: 4, liked: 5, private_message: 6, invited_to_private_message: 7, invitee_accepted: 8, posted: 9, moved_post: 10, linked: 11, granted_badge: 12, invited_to_topic: 13, custom: 14, group_mentioned: 15) end def self.mark_posts_read(user, topic_id, post_numbers) count = Notification .where(user_id: user.id, topic_id: topic_id, post_number: post_numbers, read: false) .update_all("read = 't'") user.publish_notifications_state if count > 0 count end def self.interesting_after(min_date) result = where("created_at > ?", min_date) .includes(:topic) .visible .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 # Clean up any notifications the user can no longer see. For example, if a topic was previously # public then turns private. def self.remove_for(user_id, topic_id) Notification.where(user_id: user_id, topic_id: topic_id).delete_all end # Be wary of calling this frequently. O(n) JSON parsing can suck. def data_hash @data_hash ||= begin return nil if data.blank? parsed = JSON.parse(data) return nil if parsed.blank? parsed.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.find_by(topic_id: topic_id, post_number: post_number) end def self.recent_report(user, count = nil) count ||= 10 notifications = user.notifications .visible .recent(count) .includes(:topic) .to_a if notifications.present? notifications += user .notifications .order('notifications.created_at DESC') .where(read: false, notification_type: Notification.types[:private_message]) .joins(:topic) .where('notifications.id < ?', notifications.last.id) .limit(count) notifications.sort do |x,y| if x.unread_pm? && !y.unread_pm? -1 elsif y.unread_pm? && !x.unread_pm? 1 else y.created_at <=> x.created_at end end.take(count) else [] end end def unread_pm? Notification.types[:private_message] == self.notification_type && !read end protected def refresh_notification_count user.publish_notifications_state 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 # # idx_notifications_speedup_unread_count (user_id,notification_type) # index_notifications_on_post_action_id (post_action_id) # index_notifications_on_user_id_and_created_at (user_id,created_at) # index_notifications_on_user_id_and_topic_id_and_post_number (user_id,topic_id,post_number) #