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discourse/app/models/notification.rb

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# frozen_string_literal: true
class Notification < ActiveRecord::Base
attr_accessor :acting_user
attr_accessor :acting_username
belongs_to :user
belongs_to :topic
has_one :shelved_notification
MEMBERSHIP_REQUEST_CONSOLIDATION_WINDOW_HOURS = 24
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",
)
}
scope :unread_type, ->(user, type, limit = 30) { unread_types(user, [type], limit) }
scope :unread_types,
->(user, types, limit = 30) do
where(user_id: user.id, read: false, notification_type: types)
.visible
.includes(:topic)
.limit(limit)
end
scope :prioritized,
->(deprioritized_types = []) do
scope = order("notifications.high_priority AND NOT notifications.read DESC")
if deprioritized_types.present?
scope =
scope.order(
DB.sql_fragment(
"NOT notifications.read AND notifications.notification_type NOT IN (?) DESC",
deprioritized_types,
),
)
else
scope = scope.order("NOT notifications.read DESC")
end
scope.order("notifications.created_at DESC")
end
scope :for_user_menu,
->(user_id, limit: 30) do
where(user_id: user_id).visible.prioritized.includes(:topic).limit(limit)
end
attr_accessor :skip_send_email
after_commit :refresh_notification_count, on: %i[create update destroy]
after_commit :send_email, on: :create
after_commit(on: :create) { DiscourseEvent.trigger(:notification_created, self) }
before_create do
# if we have manually set the notification to high_priority on create then
# make sure that is respected
self.high_priority =
self.high_priority || Notification.high_priority_types.include?(self.notification_type)
end
def self.consolidate_or_create!(notification_params)
notification = new(notification_params)
consolidation_planner = Notifications::ConsolidationPlanner.new
consolidated_notification = consolidation_planner.consolidate_or_save!(notification)
consolidated_notification == :no_plan ? notification.tap(&:save!) : consolidated_notification
end
def self.purge_old!
return if SiteSetting.max_notifications_per_user == 0
DB.exec(<<~SQL, SiteSetting.max_notifications_per_user)
DELETE FROM notifications n1
USING (
SELECT * FROM (
SELECT
user_id,
id,
rank() OVER (PARTITION BY user_id ORDER BY id DESC)
FROM notifications
) AS X
WHERE rank = ?
) n2
WHERE n1.user_id = n2.user_id AND n1.id < n2.id
SQL
end
def self.ensure_consistency!
DB.exec(<<~SQL)
DELETE
FROM notifications n
WHERE high_priority
AND n.topic_id IS NOT NULL
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
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,
code_review_commit_approved: 21,
membership_request_accepted: 22,
membership_request_consolidated: 23,
bookmark_reminder: 24,
reaction: 25,
votes_released: 26,
event_reminder: 27,
event_invitation: 28,
chat_mention: 29,
chat_message: 30,
chat_invitation: 31,
chat_group_mention: 32, # March 2022 - This is obsolete, as all chat_mentions use `chat_mention` type
chat_quoted: 33,
assigned: 34,
question_answer_user_commented: 35, # Used by https://github.com/discourse/discourse-question-answer
watching_category_or_tag: 36,
new_features: 37,
admin_problems: 38,
linked_consolidated: 39,
following: 800, # Used by https://github.com/discourse/discourse-follow
following_created_topic: 801, # Used by https://github.com/discourse/discourse-follow
following_replied: 802, # Used by https://github.com/discourse/discourse-follow
circles_activity: 900, # Used by https://github.com/discourse/discourse-circles
)
end
def self.high_priority_types
@high_priority_types ||= [types[:private_message], types[:bookmark_reminder]]
end
def self.normal_priority_types
@normal_priority_types ||= types.reject { |_k, v| high_priority_types.include?(v) }.values
end
def self.mark_posts_read(user, topic_id, post_numbers)
Notification.where(
user_id: user.id,
topic_id: topic_id,
post_number: post_numbers,
read: false,
).update_all(read: true)
end
def self.read(user, notification_ids)
Notification.where(id: notification_ids, user_id: user.id, read: false).update_all(read: true)
end
def self.read_types(user, types = nil)
query = Notification.where(user_id: user.id, read: false)
query = query.where(notification_type: types) if types
query.update_all(read: true)
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
def self.filter_inaccessible_topic_notifications(guardian, notifications)
topic_ids = notifications.map { |n| n.topic_id }.compact.uniq
accessible_topic_ids = guardian.can_see_topic_ids(topic_ids: topic_ids)
notifications.select { |n| n.topic_id.blank? || accessible_topic_ids.include?(n.topic_id) }
end
# Be wary of calling this frequently. O(n) JSON parsing can suck.
def data_hash
@data_hash ||=
begin
return {} if data.blank?
parsed = JSON.parse(data)
return {} if parsed.blank?
parsed.with_indifferent_access
end
end
def url
topic.relative_url(post_number) if topic.present?
end
def post
return if topic_id.blank? || post_number.blank?
Post.find_by(topic_id: topic_id, post_number: post_number)
end
# Update `index_notifications_user_menu_ordering_deprioritized_likes` index when updating this as this is used by
# `Notification.prioritized_list` to deprioritize like typed notifications. Also See
# `db/migrate/20240306063428_add_indexes_to_notifications.rb`.
def self.like_types
[
Notification.types[:liked],
Notification.types[:liked_consolidated],
Notification.types[:reaction],
]
end
def self.prioritized_list(user, count: 30, types: [])
return [] if !user&.user_option
notifications =
user
.notifications
.includes(:topic)
.visible
.prioritized(types.present? ? [] : like_types)
.limit(count)
if types.present?
notifications = notifications.where(notification_type: types)
elsif user.user_option.like_notification_frequency ==
UserOption.like_notification_frequency_type[:never]
like_types.each do |notification_type|
notifications = notifications.where("notification_type <> ?", notification_type)
end
end
notifications.to_a
end
def self.recent_report(user, count = nil, types = [])
return unless user && user.user_option
count ||= 10
notifications = user.notifications.visible.recent(count).includes(:topic)
notifications = notifications.where(notification_type: types) if types.present?
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?
builder = DB.build(<<~SQL)
SELECT n.id FROM notifications n
/*where*/
ORDER BY n.id ASC
/*limit*/
SQL
builder.where(<<~SQL, user_id: user.id)
n.high_priority = TRUE AND
n.user_id = :user_id AND
NOT read
SQL
builder.where("notification_type IN (:types)", types: types) if types.present?
builder.limit(count.to_i)
ids = builder.query_single
if ids.length > 0
notifications +=
user
.notifications
.order("notifications.created_at DESC")
.where(id: ids)
.joins(:topic)
.limit(count)
end
notifications
.uniq(&:id)
.sort do |x, y|
if x.unread_high_priority? && !y.unread_high_priority?
-1
elsif y.unread_high_priority? && !x.unread_high_priority?
1
else
y.created_at <=> x.created_at
end
end
.take(count)
else
[]
end
end
def self.populate_acting_user(notifications)
usernames =
notifications.map do |notification|
notification.acting_username =
(
notification.data_hash[:username] || notification.data_hash[:display_username] ||
notification.data_hash[:mentioned_by_username] ||
notification.data_hash[:invited_by_username]
)&.downcase
end
users = User.where(username_lower: usernames.uniq).index_by(&:username_lower)
notifications.each do |notification|
notification.acting_user = users[notification.acting_username]
end
notifications
end
def unread_high_priority?
self.high_priority? && !read
end
def post_id
Post.where(topic: topic_id, post_number: post_number).pick(:id)
end
protected
def refresh_notification_count
User.find_by(id: user_id)&.publish_notifications_state if user_id
end
def send_email
return if skip_send_email
if user.do_not_disturb?
ShelvedNotification.create(notification_id: self.id)
else
NotificationEmailer.process_notification(self)
end
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
# high_priority :boolean default(FALSE), not null
#
# Indexes
#
# idx_notifications_speedup_unread_count (user_id,notification_type) WHERE (NOT read)
# index_notifications_on_post_action_id (post_action_id)
# index_notifications_on_topic_id_and_post_number (topic_id,post_number)
# 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)
# index_notifications_read_or_not_high_priority (user_id,id DESC,read,topic_id) WHERE (read OR (high_priority = false))
# index_notifications_unique_unread_high_priority (user_id,id) UNIQUE WHERE ((NOT read) AND (high_priority = true))
# index_notifications_user_menu_ordering (user_id, ((high_priority AND (NOT read))) DESC, ((NOT read)) DESC, created_at DESC)
# index_notifications_user_menu_ordering_deprioritized_likes (user_id, ((high_priority AND (NOT read))) DESC, (((NOT read) AND (notification_type <> ALL (ARRAY[5, 19, 25])))) DESC, created_at DESC)
#
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