discourse/app/models/notification.rb

191 lines
5.5 KiB
Ruby

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)
#