mastodon/app/models/notification.rb

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# frozen_string_literal: true
# == Schema Information
#
# Table name: notifications
#
# id :bigint(8) not null, primary key
# activity_id :bigint(8) not null
# activity_type :string not null
# created_at :datetime not null
# updated_at :datetime not null
# account_id :bigint(8) not null
# from_account_id :bigint(8) not null
# type :string
#
class Notification < ApplicationRecord
self.inheritance_column = nil
include Paginable
LEGACY_TYPE_CLASS_MAP = {
'Mention' => :mention,
'Status' => :reblog,
'Follow' => :follow,
'FollowRequest' => :follow_request,
'Favourite' => :favourite,
'Poll' => :poll,
}.freeze
TYPES = %i(
mention
status
reblog
follow
follow_request
favourite
poll
update
admin.sign_up
admin.report
).freeze
TARGET_STATUS_INCLUDES_BY_TYPE = {
status: :status,
reblog: [status: :reblog],
mention: [mention: :status],
favourite: [favourite: :status],
poll: [poll: :status],
update: :status,
'admin.report': [report: :target_account],
}.freeze
belongs_to :account, optional: true
belongs_to :from_account, class_name: 'Account', optional: true
belongs_to :activity, polymorphic: true, optional: true
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with_options foreign_key: 'activity_id', optional: true do
belongs_to :mention, inverse_of: :notification
belongs_to :status, inverse_of: :notification
belongs_to :follow, inverse_of: :notification
belongs_to :follow_request, inverse_of: :notification
belongs_to :favourite, inverse_of: :notification
belongs_to :poll, inverse_of: false
belongs_to :report, inverse_of: false
end
validates :type, inclusion: { in: TYPES }
scope :without_suspended, -> { joins(:from_account).merge(Account.without_suspended) }
def type
@type ||= (super || LEGACY_TYPE_CLASS_MAP[activity_type]).to_sym
end
def target_status
case type
when :status, :update
status
when :reblog
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status&.reblog
when :favourite
favourite&.status
when :mention
mention&.status
when :poll
poll&.status
end
end
class << self
def browserable(types: [], exclude_types: [], from_account_id: nil)
requested_types = if types.empty?
TYPES
else
types.map(&:to_sym) & TYPES
end
requested_types -= exclude_types.map(&:to_sym)
all.tap do |scope|
scope.merge!(where(from_account_id: from_account_id)) if from_account_id.present?
scope.merge!(where(type: requested_types)) unless requested_types.size == TYPES.size
end
end
def preload_cache_collection_target_statuses(notifications, &_block)
notifications.group_by(&:type).each do |type, grouped_notifications|
associations = TARGET_STATUS_INCLUDES_BY_TYPE[type]
next unless associations
# Instead of using the usual `includes`, manually preload each type.
# If polymorphic associations are loaded with the usual `includes`, other types of associations will be loaded more.
ActiveRecord::Associations::Preloader.new(records: grouped_notifications, associations: associations).call
end
unique_target_statuses = notifications.filter_map(&:target_status).uniq
# Call cache_collection in block
cached_statuses_by_id = yield(unique_target_statuses).index_by(&:id)
notifications.each do |notification|
next if notification.target_status.nil?
cached_status = cached_statuses_by_id[notification.target_status.id]
case notification.type
when :status, :update
notification.status = cached_status
when :reblog
notification.status.reblog = cached_status
when :favourite
notification.favourite.status = cached_status
when :mention
notification.mention.status = cached_status
when :poll
notification.poll.status = cached_status
end
end
notifications
end
end
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after_initialize :set_from_account
before_validation :set_from_account
private
def set_from_account
return unless new_record?
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case activity_type
when 'Status', 'Follow', 'Favourite', 'FollowRequest', 'Poll', 'Report'
self.from_account_id = activity&.account_id
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when 'Mention'
self.from_account_id = activity&.status&.account_id
when 'Account'
self.from_account_id = activity&.id
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end
end
end