gitlab-org--gitlab-foss/app/services/notification_recipient_service.rb

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#
# Used by NotificationService to determine who should receive notification
#
module NotificationRecipientService
def self.notifiable_users(users, *args)
users.compact.map { |u| NotificationRecipient.new(u, *args) }.select(&:notifiable?).map(&:user)
end
def self.notifiable?(user, *args)
NotificationRecipient.new(user, *args).notifiable?
end
def self.build_recipients(*a)
Builder::Default.new(*a).recipient_users
end
def self.build_new_note_recipients(*a)
Builder::NewNote.new(*a).recipient_users
end
module Builder
class Base
def initialize(*)
raise 'abstract'
end
def build!
raise 'abstract'
end
def filter!
recipients.select!(&:notifiable?)
end
def acting_user
current_user
end
def target
raise 'abstract'
end
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# rubocop:disable Rails/Delegate
def project
target.project
end
def recipients
@recipients ||= []
end
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def <<(pair)
users, type = pair
if users.is_a?(ActiveRecord::Relation)
users = users.includes(:notification_settings)
end
users = Array(users)
users.compact!
recipients.concat(users.map { |u| make_recipient(u, type) })
end
def user_scope
User.includes(:notification_settings)
end
def make_recipient(user, type)
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NotificationRecipient.new(
user, type,
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project: project,
custom_action: custom_action,
target: target,
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acting_user: acting_user
)
end
def recipient_users
@recipient_users ||=
begin
build!
filter!
users = recipients.map(&:user)
users.uniq!
users.freeze
end
end
def custom_action
nil
end
protected
def add_participants(user)
return unless target.respond_to?(:participants)
self << [target.participants(user), :watch]
end
# Get project/group users with CUSTOM notification level
def add_custom_notifications
user_ids = []
# Users with a notification setting on group or project
user_ids += user_ids_notifiable_on(project, :custom)
user_ids += user_ids_notifiable_on(project.group, :custom)
# Users with global level custom
user_ids_with_project_level_global = user_ids_notifiable_on(project, :global)
user_ids_with_group_level_global = user_ids_notifiable_on(project.group, :global)
global_users_ids = user_ids_with_project_level_global.concat(user_ids_with_group_level_global)
user_ids += user_ids_with_global_level_custom(global_users_ids, custom_action)
self << [user_scope.where(id: user_ids), :watch]
end
def add_project_watchers
self << [project_watchers, :watch]
end
# Get project users with WATCH notification level
def project_watchers
project_members_ids = user_ids_notifiable_on(project)
user_ids_with_project_global = user_ids_notifiable_on(project, :global)
user_ids_with_group_global = user_ids_notifiable_on(project.group, :global)
user_ids = user_ids_with_global_level_watch((user_ids_with_project_global + user_ids_with_group_global).uniq)
user_ids_with_project_setting = select_project_members_ids(user_ids_with_project_global, user_ids)
user_ids_with_group_setting = select_group_members_ids(project.group, project_members_ids, user_ids_with_group_global, user_ids)
user_scope.where(id: user_ids_with_project_setting.concat(user_ids_with_group_setting).uniq)
end
def add_subscribed_users
return unless target.respond_to? :subscribers
self << [target.subscribers(project), :subscription]
end
def user_ids_notifiable_on(resource, notification_level = nil)
return [] unless resource
scope = resource.notification_settings
if notification_level
scope = scope.where(level: NotificationSetting.levels[notification_level])
end
scope.pluck(:user_id)
end
# Build a list of user_ids based on project notification settings
def select_project_members_ids(global_setting, user_ids_global_level_watch)
user_ids = user_ids_notifiable_on(project, :watch)
# If project setting is global, add to watch list if global setting is watch
user_ids + (global_setting & user_ids_global_level_watch)
end
# Build a list of user_ids based on group notification settings
def select_group_members_ids(group, project_members, global_setting, user_ids_global_level_watch)
uids = user_ids_notifiable_on(group, :watch)
# Group setting is global, add to user_ids list if global setting is watch
uids + (global_setting & user_ids_global_level_watch) - project_members
end
def user_ids_with_global_level_watch(ids)
settings_with_global_level_of(:watch, ids).pluck(:user_id)
end
def user_ids_with_global_level_custom(ids, action)
settings_with_global_level_of(:custom, ids).pluck(:user_id)
end
def settings_with_global_level_of(level, ids)
NotificationSetting.where(
user_id: ids,
source_type: nil,
level: NotificationSetting.levels[level]
)
end
def add_labels_subscribers(labels: nil)
return unless target.respond_to? :labels
(labels || target.labels).each do |label|
self << [label.subscribers(project), :subscription]
end
end
end
class Default < Base
attr_reader :target
attr_reader :current_user
attr_reader :action
attr_reader :previous_assignee
attr_reader :skip_current_user
def initialize(target, current_user, action:, previous_assignee: nil, skip_current_user: true)
@target = target
@current_user = current_user
@action = action
@previous_assignee = previous_assignee
@skip_current_user = skip_current_user
end
def build!
add_participants(current_user)
add_project_watchers
add_custom_notifications
# Re-assign is considered as a mention of the new assignee
case custom_action
when :reassign_merge_request
self << [previous_assignee, :mention]
self << [target.assignee, :mention]
when :reassign_issue
previous_assignees = Array(previous_assignee)
self << [previous_assignees, :mention]
self << [target.assignees, :mention]
end
add_subscribed_users
if [:new_issue, :new_merge_request].include?(custom_action)
add_labels_subscribers
end
end
def acting_user
current_user if skip_current_user
end
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# Build event key to search on custom notification level
# Check NotificationSetting::EMAIL_EVENTS
def custom_action
@custom_action ||= "#{action}_#{target.class.model_name.name.underscore}".to_sym
end
end
class NewNote < Base
attr_reader :note
def initialize(note)
@note = note
end
def target
note.noteable
end
# NOTE: may be nil, in the case of a PersonalSnippet
#
# (this is okay because NotificationRecipient is written
# to handle nil projects)
def project
note.project
end
def build!
# Add all users participating in the thread (author, assignee, comment authors)
add_participants(note.author)
self << [note.mentioned_users, :mention]
unless note.for_personal_snippet?
# Merge project watchers
add_project_watchers
# Merge project with custom notification
add_custom_notifications
end
add_subscribed_users
end
def custom_action
:new_note
end
def acting_user
note.author
end
end
end
end