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