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306 lines
8.7 KiB
306 lines
8.7 KiB
# frozen_string_literal: true
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class DeleteAccountService < BaseService
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include Payloadable
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ASSOCIATIONS_ON_SUSPEND = %w(
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account_notes
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account_pins
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active_relationships
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aliases
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block_relationships
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blocked_by_relationships
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conversation_mutes
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conversations
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custom_filters
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devices
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domain_blocks
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featured_tags
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follow_requests
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list_accounts
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migrations
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mute_relationships
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muted_by_relationships
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notifications
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owned_lists
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passive_relationships
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report_notes
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scheduled_statuses
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status_pins
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).freeze
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# The following associations have no important side-effects
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# in callbacks and all of their own associations are secured
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# by foreign keys, making them safe to delete without loading
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# into memory
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ASSOCIATIONS_WITHOUT_SIDE_EFFECTS = %w(
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account_notes
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account_pins
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aliases
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conversation_mutes
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conversations
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custom_filters
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devices
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domain_blocks
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featured_tags
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follow_requests
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list_accounts
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migrations
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mute_relationships
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muted_by_relationships
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notifications
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owned_lists
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scheduled_statuses
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status_pins
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)
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ASSOCIATIONS_ON_DESTROY = %w(
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reports
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targeted_moderation_notes
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targeted_reports
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).freeze
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# Suspend or remove an account and remove as much of its data
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# as possible. If it's a local account and it has not been confirmed
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# or never been approved, then side effects are skipped and both
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# the user and account records are removed fully. Otherwise,
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# it is controlled by options.
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# @param [Account]
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# @param [Hash] options
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# @option [Boolean] :reserve_email Keep user record. Only applicable for local accounts
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# @option [Boolean] :reserve_username Keep account record
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# @option [Boolean] :skip_side_effects Side effects are ActivityPub and streaming API payloads
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# @option [Boolean] :skip_activitypub Skip sending ActivityPub payloads. Implied by :skip_side_effects
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# @option [Time] :suspended_at Only applicable when :reserve_username is true
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def call(account, **options)
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@account = account
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@options = { reserve_username: true, reserve_email: true }.merge(options)
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if @account.local? && @account.user_unconfirmed_or_pending?
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@options[:reserve_email] = false
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@options[:reserve_username] = false
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@options[:skip_side_effects] = true
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end
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@options[:skip_activitypub] = true if @options[:skip_side_effects]
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distribute_activities!
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purge_content!
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fulfill_deletion_request!
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end
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private
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def distribute_activities!
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return if skip_activitypub?
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if @account.local?
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delete_actor!
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elsif @account.activitypub?
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reject_follows!
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undo_follows!
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end
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end
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def reject_follows!
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# When deleting a remote account, the account obviously doesn't
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# actually become deleted on its origin server, i.e. unlike a
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# locally deleted account it continues to have access to its home
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# feed and other content. To prevent it from being able to continue
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# to access toots it would receive because it follows local accounts,
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# we have to force it to unfollow them.
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ActivityPub::DeliveryWorker.push_bulk(Follow.where(account: @account)) do |follow|
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[Oj.dump(serialize_payload(follow, ActivityPub::RejectFollowSerializer)), follow.target_account_id, @account.inbox_url]
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end
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end
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def undo_follows!
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# When deleting a remote account, the account obviously doesn't
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# actually become deleted on its origin server, but following relationships
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# are severed on our end. Therefore, make the remote server aware that the
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# follow relationships are severed to avoid confusion and potential issues
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# if the remote account gets un-suspended.
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ActivityPub::DeliveryWorker.push_bulk(Follow.where(target_account: @account)) do |follow|
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[Oj.dump(serialize_payload(follow, ActivityPub::UndoFollowSerializer)), follow.account_id, @account.inbox_url]
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end
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end
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def purge_user!
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return if !@account.local? || @account.user.nil?
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if keep_user_record?
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@account.user.disable!
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@account.user.invites.where(uses: 0).destroy_all
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else
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@account.user.destroy
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end
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end
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def purge_content!
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purge_user!
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purge_profile!
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purge_statuses!
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purge_mentions!
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purge_media_attachments!
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purge_polls!
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purge_generated_notifications!
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purge_favourites!
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purge_bookmarks!
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purge_feeds!
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purge_other_associations!
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@account.destroy unless keep_account_record?
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end
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def purge_statuses!
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@account.statuses.reorder(nil).where.not(id: reported_status_ids).in_batches do |statuses|
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BatchedRemoveStatusService.new.call(statuses, skip_side_effects: skip_side_effects?)
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end
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end
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def purge_mentions!
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@account.mentions.reorder(nil).where.not(status_id: reported_status_ids).in_batches.delete_all
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end
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def purge_media_attachments!
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@account.media_attachments.reorder(nil).find_each do |media_attachment|
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next if keep_account_record? && reported_status_ids.include?(media_attachment.status_id)
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media_attachment.destroy
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end
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end
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def purge_polls!
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@account.polls.reorder(nil).where.not(status_id: reported_status_ids).in_batches.delete_all
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end
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def purge_generated_notifications!
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# By deleting polls and statuses without callbacks, we've left behind
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# polymorphically associated notifications generated by this account
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Notification.where(from_account: @account).in_batches.delete_all
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end
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def purge_favourites!
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@account.favourites.in_batches do |favourites|
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ids = favourites.pluck(:status_id)
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StatusStat.where(status_id: ids).update_all('favourites_count = GREATEST(0, favourites_count - 1)')
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Chewy.strategy.current.update(StatusesIndex, ids) if Chewy.enabled?
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Rails.cache.delete_multi(ids.map { |id| "statuses/#{id}" })
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favourites.delete_all
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end
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end
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def purge_bookmarks!
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@account.bookmarks.in_batches do |bookmarks|
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Chewy.strategy.current.update(StatusesIndex, bookmarks.pluck(:status_id)) if Chewy.enabled?
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bookmarks.delete_all
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end
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end
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def purge_other_associations!
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associations_for_destruction.each do |association_name|
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purge_association(association_name)
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end
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end
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def purge_feeds!
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return unless @account.local?
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FeedManager.instance.clean_feeds!(:home, [@account.id])
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FeedManager.instance.clean_feeds!(:list, @account.owned_lists.pluck(:id))
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end
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def purge_profile!
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# If the account is going to be destroyed
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# there is no point wasting time updating
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# its values first
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return unless keep_account_record?
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@account.silenced_at = nil
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@account.suspended_at = @options[:suspended_at] || Time.now.utc
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@account.suspension_origin = :local
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@account.locked = false
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@account.memorial = false
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@account.discoverable = false
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@account.display_name = ''
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@account.note = ''
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@account.fields = []
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@account.statuses_count = 0
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@account.followers_count = 0
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@account.following_count = 0
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@account.moved_to_account = nil
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@account.also_known_as = []
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@account.trust_level = :untrusted
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@account.avatar.destroy
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@account.header.destroy
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@account.save!
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end
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def fulfill_deletion_request!
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@account.deletion_request&.destroy
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end
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def purge_association(association_name)
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association = @account.public_send(association_name)
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if ASSOCIATIONS_WITHOUT_SIDE_EFFECTS.include?(association_name)
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association.in_batches.delete_all
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else
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association.in_batches.destroy_all
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end
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end
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def delete_actor!
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ActivityPub::DeliveryWorker.push_bulk(delivery_inboxes) do |inbox_url|
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[delete_actor_json, @account.id, inbox_url]
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end
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ActivityPub::LowPriorityDeliveryWorker.push_bulk(low_priority_delivery_inboxes) do |inbox_url|
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[delete_actor_json, @account.id, inbox_url]
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end
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end
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def delete_actor_json
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@delete_actor_json ||= Oj.dump(serialize_payload(@account, ActivityPub::DeleteActorSerializer, signer: @account))
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end
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def delivery_inboxes
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@delivery_inboxes ||= @account.followers.inboxes + Relay.enabled.pluck(:inbox_url)
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end
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def low_priority_delivery_inboxes
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Account.inboxes - delivery_inboxes
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end
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def reported_status_ids
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@reported_status_ids ||= Report.where(target_account: @account).unresolved.pluck(:status_ids).flatten.uniq
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end
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def associations_for_destruction
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if keep_account_record?
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ASSOCIATIONS_ON_SUSPEND
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else
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ASSOCIATIONS_ON_SUSPEND + ASSOCIATIONS_ON_DESTROY
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end
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end
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def keep_user_record?
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@options[:reserve_email]
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end
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def keep_account_record?
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@options[:reserve_username]
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end
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def skip_side_effects?
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@options[:skip_side_effects]
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end
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def skip_activitypub?
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@options[:skip_activitypub]
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end
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end
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