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  1. # frozen_string_literal: true
  2. class RemoveStatusService < BaseService
  3. include StreamEntryRenderer
  4. def call(status)
  5. @payload = Oj.dump(event: :delete, payload: status.id)
  6. @status = status
  7. @account = status.account
  8. @tags = status.tags.pluck(:name).to_a
  9. @mentions = status.mentions.includes(:account).to_a
  10. @reblogs = status.reblogs.to_a
  11. @stream_entry = status.stream_entry
  12. remove_from_self if status.account.local?
  13. remove_from_followers
  14. remove_reblogs
  15. remove_from_hashtags
  16. remove_from_public
  17. @status.destroy!
  18. return unless @account.local?
  19. remove_from_remote_followers
  20. remove_from_remote_affected
  21. end
  22. private
  23. def remove_from_self
  24. unpush(:home, @account, @status)
  25. end
  26. def remove_from_followers
  27. @account.followers.local.find_each do |follower|
  28. unpush(:home, follower, @status)
  29. end
  30. end
  31. def remove_from_remote_affected
  32. # People who got mentioned in the status, or who
  33. # reblogged it from someone else might not follow
  34. # the author and wouldn't normally receive the
  35. # delete notification - so here, we explicitly
  36. # send it to them
  37. target_accounts = (@mentions.map(&:account).reject(&:local?) + @reblogs.map(&:account).reject(&:local?)).uniq(&:id)
  38. # Ostatus
  39. NotificationWorker.push_bulk(target_accounts.select(&:ostatus?).uniq(&:domain)) do |target_account|
  40. [salmon_xml, @account.id, target_account.id]
  41. end
  42. # ActivityPub
  43. ActivityPub::DeliveryWorker.push_bulk(target_accounts.select(&:activitypub?).uniq(&:inbox_url)) do |target_account|
  44. [signed_activity_json, @account.id, target_account.inbox_url]
  45. end
  46. end
  47. def remove_from_remote_followers
  48. # OStatus
  49. Pubsubhubbub::RawDistributionWorker.perform_async(salmon_xml, @account.id)
  50. # ActivityPub
  51. ActivityPub::DeliveryWorker.push_bulk(@account.followers.inboxes) do |inbox_url|
  52. [signed_activity_json, @account.id, inbox_url]
  53. end
  54. end
  55. def salmon_xml
  56. @salmon_xml ||= stream_entry_to_xml(@stream_entry)
  57. end
  58. def signed_activity_json
  59. @signed_activity_json ||= Oj.dump(ActivityPub::LinkedDataSignature.new(activity_json).sign!(@account))
  60. end
  61. def activity_json
  62. @activity_json ||= ActiveModelSerializers::SerializableResource.new(
  63. @status,
  64. serializer: @status.reblog? ? ActivityPub::UndoAnnounceSerializer : ActivityPub::DeleteSerializer,
  65. adapter: ActivityPub::Adapter
  66. ).as_json
  67. end
  68. def remove_reblogs
  69. # We delete reblogs of the status before the original status,
  70. # because once original status is gone, reblogs will disappear
  71. # without us being able to do all the fancy stuff
  72. @reblogs.each do |reblog|
  73. RemoveStatusService.new.call(reblog)
  74. end
  75. end
  76. def unpush(type, receiver, status)
  77. if status.reblog? && !redis.zscore(FeedManager.instance.key(type, receiver.id), status.reblog_of_id).nil?
  78. redis.zadd(FeedManager.instance.key(type, receiver.id), status.reblog_of_id, status.reblog_of_id)
  79. else
  80. redis.zremrangebyscore(FeedManager.instance.key(type, receiver.id), status.id, status.id)
  81. end
  82. Redis.current.publish("timeline:#{receiver.id}", @payload)
  83. end
  84. def remove_from_hashtags
  85. @tags.each do |hashtag|
  86. Redis.current.publish("timeline:hashtag:#{hashtag}", @payload)
  87. Redis.current.publish("timeline:hashtag:#{hashtag}:local", @payload) if @status.local?
  88. end
  89. end
  90. def remove_from_public
  91. Redis.current.publish('timeline:public', @payload)
  92. Redis.current.publish('timeline:public:local', @payload) if @status.local?
  93. end
  94. def redis
  95. Redis.current
  96. end
  97. end