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# frozen_string_literal: true
class NotificationRecipient
include Gitlab::Utils::StrongMemoize
attr_reader :user, :type, :reason
def initialize(user, type, **opts)
unless NotificationSetting.levels.key?(type) || type == :subscription
raise ArgumentError, "invalid type: #{type.inspect}"
end
@custom_action = opts[:custom_action]
@acting_user = opts[:acting_user]
@target = opts[:target]
@project = opts[:project] || default_project
@group = opts[:group] || @project&.group
@user = user
@type = type
@reason = opts[:reason]
@skip_read_ability = opts[:skip_read_ability]
end
def notification_setting
@notification_setting ||= find_notification_setting
end
def notification_level
@notification_level ||= notification_setting&.level&.to_sym
end
def notifiable?
return false unless has_access?
return false if own_activity?
# even users with :disabled notifications receive manual subscriptions
return !unsubscribed? if @type == :subscription
return false unless suitable_notification_level?
# check this last because it's expensive
# nobody should receive notifications if they've specifically unsubscribed
# except if they were mentioned.
return false if @type != :mention && unsubscribed?
true
end
def suitable_notification_level?
case notification_level
when :disabled, nil
false
when :custom
custom_enabled? || %i[participating mention].include?(@type)
when :watch, :participating
!action_excluded?
when :mention
@type == :mention
else
false
end
end
def custom_enabled?
@custom_action && notification_setting&.event_enabled?(@custom_action)
end
def unsubscribed?
return false unless @target
return false unless @target.respond_to?(:subscriptions)
subscription = @target.subscriptions.find { |subscription| subscription.user_id == @user.id }
subscription && !subscription.subscribed
end
def own_activity?
return false unless @acting_user
if user == @acting_user
# if activity was generated by the same user, change reason to :own_activity
@reason = NotificationReason::OWN_ACTIVITY
# If the user wants to be notified, we must return `false`
!@acting_user.notified_of_own_activity?
else
false
end
end
def has_access?
DeclarativePolicy.subject_scope do
break false unless user.can?(:receive_notifications)
break true if @skip_read_ability
break false if @target && !user.can?(:read_cross_project)
break false if @project && !user.can?(:read_project, @project)
break true unless read_ability
break true unless DeclarativePolicy.has_policy?(@target)
user.can?(read_ability, @target)
end
end
def action_excluded?
excluded_watcher_action? || excluded_participating_action?
end
def excluded_watcher_action?
return false unless @custom_action && notification_level == :watch
NotificationSetting::EXCLUDED_WATCHER_EVENTS.include?(@custom_action)
end
def excluded_participating_action?
return false unless @custom_action && notification_level == :participating
NotificationSetting::EXCLUDED_PARTICIPATING_EVENTS.include?(@custom_action)
end
private
def read_ability
return nil if @skip_read_ability
return @read_ability if instance_variable_defined?(:@read_ability)
@read_ability =
case @target
when Issuable
:"read_#{@target.to_ability_name}"
when Ci::Pipeline
:read_build # We have build trace in pipeline emails
when ActiveRecord::Base
:"read_#{@target.class.model_name.name.underscore}"
else
nil
end
end
def default_project
return nil if @target.nil?
return @target if @target.is_a?(Project)
return @target.project if @target.respond_to?(:project)
end
def find_notification_setting
project_setting = @project && user.notification_settings_for(@project)
return project_setting unless project_setting.nil? || project_setting.global?
group_setting = closest_non_global_group_notification_settting
return group_setting unless group_setting.nil?
user.global_notification_setting
end
# Returns the notification_setting of the lowest group in hierarchy with non global level
def closest_non_global_group_notification_settting
return unless @group
return if indexed_group_notification_settings.empty?
notification_setting = nil
@group.self_and_ancestors_ids.each do |id|
notification_setting = indexed_group_notification_settings[id]
break if notification_setting
end
notification_setting
end
def indexed_group_notification_settings
strong_memoize(:indexed_group_notification_settings) do
@group.notification_settings.where(user_id: user.id)
.where.not(level: NotificationSetting.levels[:global])
.index_by(&:source_id)
end
end
end
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