discourse/app/models/notification.rb

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require_dependency 'enum'
require_dependency 'notification_emailer'
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class Notification < ActiveRecord::Base
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belongs_to :user
belongs_to :topic
validates_presence_of :data
validates_presence_of :notification_type
scope :unread, lambda { where(read: false) }
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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')
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.where('topics.id IS NULL OR topics.deleted_at IS NULL') }
scope :filter_by_display_username_and_type, ->(username, notification_type) {
where("data::json ->> 'display_username' = ?", username)
.where(notification_type: notification_type)
.order(created_at: :desc)
}
attr_accessor :skip_send_email
after_commit :send_email, on: :create
after_commit :refresh_notification_count, on: [:create, :update, :destroy]
def self.ensure_consistency!
DB.exec(<<~SQL, Notification.types[:private_message])
DELETE
FROM notifications n
WHERE notification_type = ?
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
)
SQL
end
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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,
group_message_summary: 16,
watching_first_post: 17,
topic_reminder: 18,
liked_consolidated: 19,
post_approved: 20
)
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end
def self.mark_posts_read(user, topic_id, post_numbers)
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Notification
.where(
user_id: user.id,
topic_id: topic_id,
post_number: post_numbers,
read: false
)
.update_all(read: true)
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end
def self.read(user, notification_ids)
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Notification
.where(
id: notification_ids,
user_id: user.id,
read: false
)
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.update_all(read: true)
end
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def self.interesting_after(min_date)
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result = where("created_at > ?", min_date)
.includes(:topic)
.visible
.unread
.limit(20)
.order("CASE WHEN notification_type = #{Notification.types[:replied]} THEN 1
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WHEN notification_type = #{Notification.types[:mentioned]} THEN 2
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ELSE 3
END, created_at DESC").to_a
# Remove any duplicates by type and topic
if result.present?
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seen = {}
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to_remove = Set.new
result.each do |r|
seen[r.notification_type] ||= Set.new
if seen[r.notification_type].include?(r.topic_id)
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to_remove << r.id
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else
seen[r.notification_type] << r.topic_id
end
end
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result.reject! { |r| to_remove.include?(r.id) }
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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
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# Be wary of calling this frequently. O(n) JSON parsing can suck.
def data_hash
@data_hash ||= begin
return {} if data.blank?
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parsed = JSON.parse(data)
return {} if parsed.blank?
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parsed.with_indifferent_access
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end
end
def url
topic.relative_url(post_number) if topic.present?
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end
def post
return if topic_id.blank? || post_number.blank?
Post.find_by(topic_id: topic_id, post_number: post_number)
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end
def self.recent_report(user, count = nil)
return unless user && user.user_option
count ||= 10
notifications = user.notifications
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.visible
.recent(count)
.includes(:topic)
if user.user_option.like_notification_frequency == UserOption.like_notification_frequency_type[:never]
[
Notification.types[:liked],
Notification.types[:liked_consolidated]
].each do |notification_type|
notifications = notifications.where(
'notification_type <> ?', notification_type
)
end
end
notifications = notifications.to_a
if notifications.present?
ids = DB.query_single(<<~SQL, count.to_i)
SELECT n.id FROM notifications n
WHERE
n.notification_type = 6 AND
n.user_id = #{user.id.to_i} AND
NOT read
ORDER BY n.id ASC
LIMIT ?
SQL
if ids.length > 0
notifications += user
.notifications
.order('notifications.created_at DESC')
.where(id: ids)
.joins(:topic)
.limit(count)
end
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notifications.uniq(&:id).sort do |x, y|
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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
def post_id
Post.where(topic: topic_id, post_number: post_number).pluck(:id).first
end
protected
def refresh_notification_count
begin
user.reload.publish_notifications_state
rescue ActiveRecord::RecordNotFound
# happens when we delete a user
end
end
def send_email
NotificationEmailer.process_notification(self) if !skip_send_email
end
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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
#
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# idx_notifications_speedup_unread_count (user_id,notification_type) WHERE (NOT read)
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# index_notifications_on_post_action_id (post_action_id)
# index_notifications_on_user_id_and_created_at (user_id,created_at)
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# index_notifications_on_user_id_and_id (user_id,id) UNIQUE WHERE ((notification_type = 6) AND (NOT read))
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# index_notifications_on_user_id_and_topic_id_and_post_number (user_id,topic_id,post_number)
#