forked from mirrors/catstodon
146 lines
3.9 KiB
Ruby
146 lines
3.9 KiB
Ruby
# frozen_string_literal: true
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require 'rubygems/package'
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class BackupService < BaseService
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attr_reader :account, :backup, :collection
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def call(backup)
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@backup = backup
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@account = backup.user.account
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build_json!
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build_archive!
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end
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private
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def build_json!
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@collection = serialize(collection_presenter, ActivityPub::CollectionSerializer)
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account.statuses.with_includes.reorder(nil).find_in_batches do |statuses|
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statuses.each do |status|
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item = serialize(status, ActivityPub::ActivitySerializer)
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item.delete(:'@context')
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unless item[:type] == 'Announce' || item[:object][:attachment].blank?
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item[:object][:attachment].each do |attachment|
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attachment[:url] = Addressable::URI.parse(attachment[:url]).path.gsub(/\A\/system\//, '')
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end
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end
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@collection[:orderedItems] << item
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end
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GC.start
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end
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end
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def build_archive!
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tmp_file = Tempfile.new(%w(archive .tar.gz))
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File.open(tmp_file, 'wb') do |file|
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Zlib::GzipWriter.wrap(file) do |gz|
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Gem::Package::TarWriter.new(gz) do |tar|
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dump_media_attachments!(tar)
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dump_outbox!(tar)
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dump_likes!(tar)
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dump_actor!(tar)
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end
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end
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end
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archive_filename = ['archive', Time.now.utc.strftime('%Y%m%d%H%M%S'), SecureRandom.hex(16)].join('-') + '.tar.gz'
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@backup.dump = ActionDispatch::Http::UploadedFile.new(tempfile: tmp_file, filename: archive_filename)
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@backup.processed = true
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@backup.save!
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ensure
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tmp_file.close
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tmp_file.unlink
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end
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def dump_media_attachments!(tar)
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MediaAttachment.attached.where(account: account).reorder(nil).find_in_batches do |media_attachments|
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media_attachments.each do |m|
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download_to_tar(tar, m.file, m.file.path)
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end
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GC.start
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end
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end
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def dump_outbox!(tar)
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json = Oj.dump(collection)
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tar.add_file_simple('outbox.json', 0o444, json.bytesize) do |io|
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io.write(json)
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end
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end
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def dump_actor!(tar)
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actor = serialize(account, ActivityPub::ActorSerializer)
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actor[:icon][:url] = 'avatar' + File.extname(actor[:icon][:url]) if actor[:icon]
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actor[:image][:url] = 'header' + File.extname(actor[:image][:url]) if actor[:image]
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actor[:outbox] = 'outbox.json'
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actor[:likes] = 'likes.json'
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download_to_tar(tar, account.avatar, 'avatar' + File.extname(account.avatar.path)) if account.avatar.exists?
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download_to_tar(tar, account.header, 'header' + File.extname(account.header.path)) if account.header.exists?
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json = Oj.dump(actor)
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tar.add_file_simple('actor.json', 0o444, json.bytesize) do |io|
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io.write(json)
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end
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end
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def dump_likes!(tar)
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collection = serialize(ActivityPub::CollectionPresenter.new(id: 'likes.json', type: :ordered, size: 0, items: []), ActivityPub::CollectionSerializer)
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Status.reorder(nil).joins(:favourites).includes(:account).merge(account.favourites).find_in_batches do |statuses|
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statuses.each do |status|
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collection[:totalItems] += 1
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collection[:orderedItems] << ActivityPub::TagManager.instance.uri_for(status)
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end
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GC.start
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end
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json = Oj.dump(collection)
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tar.add_file_simple('likes.json', 0o444, json.bytesize) do |io|
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io.write(json)
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end
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end
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def collection_presenter
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ActivityPub::CollectionPresenter.new(
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id: 'outbox.json',
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type: :ordered,
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size: account.statuses_count,
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items: []
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)
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end
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def serialize(object, serializer)
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ActiveModelSerializers::SerializableResource.new(
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object,
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serializer: serializer,
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adapter: ActivityPub::Adapter
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).as_json
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end
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CHUNK_SIZE = 1.megabyte
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def download_to_tar(tar, attachment, filename)
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adapter = Paperclip.io_adapters.for(attachment)
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tar.add_file_simple(filename, 0o444, adapter.size) do |io|
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while (buffer = adapter.read(CHUNK_SIZE))
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io.write(buffer)
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end
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end
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end
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end
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