discourse/app/models/notification.rb

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# frozen_string_literal: true
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class Notification < ActiveRecord::Base
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belongs_to :user
belongs_to :topic
has_one :shelved_notification
MEMBERSHIP_REQUEST_CONSOLIDATION_WINDOW_HOURS = 24
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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) do
unread_types(user, [type], limit)
end
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: [:create, :update, :destroy]
REFACTOR: Improve support for consolidating notifications. (#14904) * REFACTOR: Improve support for consolidating notifications. Before this commit, we didn't have a single way of consolidating notifications. For notifications like group summaries, we manually removed old ones before creating a new one. On the other hand, we used an after_create callback for likes and group membership requests, which caused unnecessary work, as we need to delete the record we created to replace it with a consolidated one. We now have all the consolidation rules centralized in a single place: the consolidation planner class. Other parts of the app looking to create a consolidable notification can do so by calling Notification#consolidate_or_save!, instead of the default Notification#create! method. Finally, we added two more rules: one for re-using existing group summaries and another for deleting duplicated dashboard problems PMs notifications when the user is tracking the moderator's inbox. Setting the threshold to one forces the planner to apply this rule every time. I plan to add plugin support for adding custom rules in another PR to keep this one relatively small. * DEV: Introduces a plugin API for consolidating notifications. This commit removes the `Notification#filter_by_consolidation_data` scope since plugins could have to define their criteria. The Plan class now receives two blocks, one to query for an already consolidated notification, which we'll try to update, and another to query for existing ones to consolidate. It also receives a consolidation window, which accepts an ActiveSupport::Duration object, and filter notifications created since that value.
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after_commit :send_email, on: :create
after_commit(on: :create) do
DiscourseEvent.trigger(:notification_created, self)
end
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
REFACTOR: Improve support for consolidating notifications. (#14904) * REFACTOR: Improve support for consolidating notifications. Before this commit, we didn't have a single way of consolidating notifications. For notifications like group summaries, we manually removed old ones before creating a new one. On the other hand, we used an after_create callback for likes and group membership requests, which caused unnecessary work, as we need to delete the record we created to replace it with a consolidated one. We now have all the consolidation rules centralized in a single place: the consolidation planner class. Other parts of the app looking to create a consolidable notification can do so by calling Notification#consolidate_or_save!, instead of the default Notification#create! method. Finally, we added two more rules: one for re-using existing group summaries and another for deleting duplicated dashboard problems PMs notifications when the user is tracking the moderator's inbox. Setting the threshold to one forces the planner to apply this rule every time. I plan to add plugin support for adding custom rules in another PR to keep this one relatively small. * DEV: Introduces a plugin API for consolidating notifications. This commit removes the `Notification#filter_by_consolidation_data` scope since plugins could have to define their criteria. The Plan class now receives two blocks, one to query for an already consolidated notification, which we'll try to update, and another to query for existing ones to consolidate. It also receives a consolidation window, which accepts an ActiveSupport::Duration object, and filter notifications created since that value.
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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
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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,
code_review_commit_approved: 21,
membership_request_accepted: 22,
FEATURE: Send notifications for time-based and At Desktop bookmark reminders (#9071) * This PR implements the scheduling and notification system for bookmark reminders. Every 5 minutes a schedule runs to check any reminders that need to be sent before now, limited to **300** reminders at a time. Any leftover reminders will be sent in the next run. This is to avoid having to deal with fickle sidekiq and reminders in the far-flung future, which would necessitate having a background job anyway to clean up any missing `enqueue_at` reminders. * If a reminder is sent its `reminder_at` time is cleared and the `reminder_last_sent_at` time is filled in. Notifications are only user-level notifications for now. * All JavaScript and frontend code related to displaying the bookmark reminder notification is contained here. The reminder functionality is now re-enabled in the bookmark modal as well. * This PR also implements the "Remind me next time I am at my desktop" bookmark reminder functionality. When the user is on a mobile device they are able to select this option. When they choose this option we set a key in Redis saying they have a pending at desktop reminder. The next time they change devices we check if the new device is desktop, and if it is we send reminders using a DistributedMutex. There is also a job to ensure consistency of these reminders in Redis (in case Redis drops the ball) and the at desktop reminders expire after 20 days. * Also in this PR is a fix to delete all Bookmarks for a user via `UserDestroyer`
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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,
)
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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)
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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
)
.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
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def self.interesting_after(min_date)
result = where("created_at > ?", min_date)
.includes(:topic)
.visible
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.unread
.limit(20)
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.order("CASE WHEN notification_type = #{Notification.types[:replied]} THEN 1
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?
parsed = JSON.parse(data)
return {} if parsed.blank?
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parsed.with_indifferent_access
end
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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.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
# TODO(osama): deprecate this method when redesigned_user_menu_enabled is removed
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?
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-1
elsif y.unread_high_priority? && !x.unread_high_priority?
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1
else
y.created_at <=> x.created_at
end
end.take(count)
else
[]
end
end
def unread_high_priority?
self.high_priority? && !read
end
def post_id
Post.where(topic: topic_id, post_number: post_number).pluck_first(:id)
end
protected
def refresh_notification_count
if user_id
User.find_by(id: user_id)&.publish_notifications_state
end
end
def send_email
return if skip_send_email
user.do_not_disturb? ?
ShelvedNotification.create(notification_id: self.id) :
NotificationEmailer.process_notification(self)
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
# high_priority :boolean default(FALSE), not null
#
# 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)
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# index_notifications_on_topic_id_and_post_number (topic_id,post_number)
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# 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))
#