feed_manager.rb 24 KB

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  1. # frozen_string_literal: true
  2. require 'singleton'
  3. class FeedManager
  4. include Singleton
  5. include Redisable
  6. # Maximum number of items stored in a single feed
  7. MAX_ITEMS = 400
  8. # Number of items in the feed since last reblog of status
  9. # before the new reblog will be inserted. Must be <= MAX_ITEMS
  10. # or the tracking sets will grow forever
  11. REBLOG_FALLOFF = 40
  12. # Execute block for every active account
  13. # @yield [Account]
  14. # @return [void]
  15. def with_active_accounts(&block)
  16. Account.joins(:user).where('users.current_sign_in_at > ?', User::ACTIVE_DURATION.ago).find_each(&block)
  17. end
  18. # Redis key of a feed
  19. # @param [Symbol] type
  20. # @param [Integer] id
  21. # @param [Symbol] subtype
  22. # @return [String]
  23. def key(type, id, subtype = nil)
  24. return "feed:#{type}:#{id}" unless subtype
  25. "feed:#{type}:#{id}:#{subtype}"
  26. end
  27. # Check if the status should not be added to a feed
  28. # @param [Symbol] timeline_type
  29. # @param [Status] status
  30. # @param [Account|List] receiver
  31. # @return [Boolean]
  32. def filter?(timeline_type, status, receiver)
  33. case timeline_type
  34. when :home
  35. filter_from_home?(status, receiver.id, build_crutches(receiver.id, [status]))
  36. when :list
  37. filter_from_list?(status, receiver) || filter_from_home?(status, receiver.account_id, build_crutches(receiver.account_id, [status]))
  38. when :mentions
  39. filter_from_mentions?(status, receiver.id)
  40. when :tags
  41. filter_from_tags?(status, receiver.id, build_crutches(receiver.id, [status]))
  42. else
  43. false
  44. end
  45. end
  46. # Add a status to a home feed and send a streaming API update
  47. # @param [Account] account
  48. # @param [Status] status
  49. # @param [Boolean] update
  50. # @return [Boolean]
  51. def push_to_home(account, status, update: false)
  52. return false unless add_to_feed(:home, account.id, status, aggregate_reblogs: account.user&.aggregates_reblogs?)
  53. trim(:home, account.id)
  54. PushUpdateWorker.perform_async(account.id, status.id, "timeline:#{account.id}", { 'update' => update }) if push_update_required?("timeline:#{account.id}")
  55. true
  56. end
  57. # Remove a status from a home feed and send a streaming API update
  58. # @param [Account] account
  59. # @param [Status] status
  60. # @param [Boolean] update
  61. # @return [Boolean]
  62. def unpush_from_home(account, status, update: false)
  63. return false unless remove_from_feed(:home, account.id, status, aggregate_reblogs: account.user&.aggregates_reblogs?)
  64. redis.publish("timeline:#{account.id}", Oj.dump(event: :delete, payload: status.id.to_s)) unless update
  65. true
  66. end
  67. # Add a status to a list feed and send a streaming API update
  68. # @param [List] list
  69. # @param [Status] status
  70. # @param [Boolean] update
  71. # @return [Boolean]
  72. def push_to_list(list, status, update: false)
  73. return false if filter_from_list?(status, list) || !add_to_feed(:list, list.id, status, aggregate_reblogs: list.account.user&.aggregates_reblogs?)
  74. trim(:list, list.id)
  75. PushUpdateWorker.perform_async(list.account_id, status.id, "timeline:list:#{list.id}", { 'update' => update }) if push_update_required?("timeline:list:#{list.id}")
  76. true
  77. end
  78. # Remove a status from a list feed and send a streaming API update
  79. # @param [List] list
  80. # @param [Status] status
  81. # @param [Boolean] update
  82. # @return [Boolean]
  83. def unpush_from_list(list, status, update: false)
  84. return false unless remove_from_feed(:list, list.id, status, aggregate_reblogs: list.account.user&.aggregates_reblogs?)
  85. redis.publish("timeline:list:#{list.id}", Oj.dump(event: :delete, payload: status.id.to_s)) unless update
  86. true
  87. end
  88. # Fill a home feed with an account's statuses
  89. # @param [Account] from_account
  90. # @param [Account] into_account
  91. # @return [void]
  92. def merge_into_home(from_account, into_account)
  93. timeline_key = key(:home, into_account.id)
  94. aggregate = into_account.user&.aggregates_reblogs?
  95. query = from_account.statuses.where(visibility: [:public, :unlisted, :private]).includes(:preloadable_poll, :media_attachments, reblog: :account).limit(FeedManager::MAX_ITEMS / 4)
  96. if redis.zcard(timeline_key) >= FeedManager::MAX_ITEMS / 4
  97. oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true).first.last.to_i
  98. query = query.where('id > ?', oldest_home_score)
  99. end
  100. statuses = query.to_a
  101. crutches = build_crutches(into_account.id, statuses)
  102. statuses.each do |status|
  103. next if filter_from_home?(status, into_account.id, crutches)
  104. add_to_feed(:home, into_account.id, status, aggregate_reblogs: aggregate)
  105. end
  106. trim(:home, into_account.id)
  107. end
  108. # Fill a list feed with an account's statuses
  109. # @param [Account] from_account
  110. # @param [List] list
  111. # @return [void]
  112. def merge_into_list(from_account, list)
  113. timeline_key = key(:list, list.id)
  114. aggregate = list.account.user&.aggregates_reblogs?
  115. query = from_account.statuses.where(visibility: [:public, :unlisted, :private]).includes(:preloadable_poll, :media_attachments, reblog: :account).limit(FeedManager::MAX_ITEMS / 4)
  116. if redis.zcard(timeline_key) >= FeedManager::MAX_ITEMS / 4
  117. oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true).first.last.to_i
  118. query = query.where('id > ?', oldest_home_score)
  119. end
  120. statuses = query.to_a
  121. crutches = build_crutches(list.account_id, statuses)
  122. statuses.each do |status|
  123. next if filter_from_home?(status, list.account_id, crutches) || filter_from_list?(status, list)
  124. add_to_feed(:list, list.id, status, aggregate_reblogs: aggregate)
  125. end
  126. trim(:list, list.id)
  127. end
  128. # Remove an account's statuses from a home feed
  129. # @param [Account] from_account
  130. # @param [Account] into_account
  131. # @return [void]
  132. def unmerge_from_home(from_account, into_account)
  133. timeline_key = key(:home, into_account.id)
  134. timeline_status_ids = redis.zrange(timeline_key, 0, -1)
  135. from_account.statuses.select('id, reblog_of_id').where(id: timeline_status_ids).reorder(nil).find_each do |status|
  136. remove_from_feed(:home, into_account.id, status, aggregate_reblogs: into_account.user&.aggregates_reblogs?)
  137. end
  138. end
  139. # Remove an account's statuses from a list feed
  140. # @param [Account] from_account
  141. # @param [List] list
  142. # @return [void]
  143. def unmerge_from_list(from_account, list)
  144. timeline_key = key(:list, list.id)
  145. timeline_status_ids = redis.zrange(timeline_key, 0, -1)
  146. from_account.statuses.select('id, reblog_of_id').where(id: timeline_status_ids).reorder(nil).find_each do |status|
  147. remove_from_feed(:list, list.id, status, aggregate_reblogs: list.account.user&.aggregates_reblogs?)
  148. end
  149. end
  150. # Clear all statuses from or mentioning target_account from a home feed
  151. # @param [Account] account
  152. # @param [Account] target_account
  153. # @return [void]
  154. def clear_from_home(account, target_account)
  155. timeline_key = key(:home, account.id)
  156. timeline_status_ids = redis.zrange(timeline_key, 0, -1)
  157. statuses = Status.where(id: timeline_status_ids).select(:id, :reblog_of_id, :account_id).to_a
  158. reblogged_ids = Status.where(id: statuses.map(&:reblog_of_id).compact, account: target_account).pluck(:id)
  159. with_mentions_ids = Mention.active.where(status_id: statuses.flat_map { |s| [s.id, s.reblog_of_id] }.compact, account: target_account).pluck(:status_id)
  160. target_statuses = statuses.select do |status|
  161. status.account_id == target_account.id || reblogged_ids.include?(status.reblog_of_id) || with_mentions_ids.include?(status.id) || with_mentions_ids.include?(status.reblog_of_id)
  162. end
  163. target_statuses.each do |status|
  164. unpush_from_home(account, status)
  165. end
  166. end
  167. # Clear all statuses from or mentioning target_account from a list feed
  168. # @param [List] list
  169. # @param [Account] target_account
  170. # @return [void]
  171. def clear_from_list(list, target_account)
  172. timeline_key = key(:list, list.id)
  173. timeline_status_ids = redis.zrange(timeline_key, 0, -1)
  174. statuses = Status.where(id: timeline_status_ids).select(:id, :reblog_of_id, :account_id).to_a
  175. reblogged_ids = Status.where(id: statuses.map(&:reblog_of_id).compact, account: target_account).pluck(:id)
  176. with_mentions_ids = Mention.active.where(status_id: statuses.flat_map { |s| [s.id, s.reblog_of_id] }.compact, account: target_account).pluck(:status_id)
  177. target_statuses = statuses.select do |status|
  178. status.account_id == target_account.id || reblogged_ids.include?(status.reblog_of_id) || with_mentions_ids.include?(status.id) || with_mentions_ids.include?(status.reblog_of_id)
  179. end
  180. target_statuses.each do |status|
  181. unpush_from_list(list, status)
  182. end
  183. end
  184. # Clear all statuses from or mentioning target_account from an account's lists
  185. # @param [Account] account
  186. # @param [Account] target_account
  187. # @return [void]
  188. def clear_from_lists(account, target_account)
  189. List.where(account: account).each do |list|
  190. clear_from_list(list, target_account)
  191. end
  192. end
  193. # Populate home feed of account from scratch
  194. # @param [Account] account
  195. # @return [void]
  196. def populate_home(account)
  197. limit = FeedManager::MAX_ITEMS / 2
  198. aggregate = account.user&.aggregates_reblogs?
  199. timeline_key = key(:home, account.id)
  200. account.statuses.limit(limit).each do |status|
  201. add_to_feed(:home, account.id, status, aggregate_reblogs: aggregate)
  202. end
  203. account.following.includes(:account_stat).find_each do |target_account|
  204. if redis.zcard(timeline_key) >= limit
  205. oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true).first.last.to_i
  206. last_status_score = Mastodon::Snowflake.id_at(target_account.last_status_at)
  207. # If the feed is full and this account has not posted more recently
  208. # than the last item on the feed, then we can skip the whole account
  209. # because none of its statuses would stay on the feed anyway
  210. next if last_status_score < oldest_home_score
  211. end
  212. statuses = target_account.statuses.where(visibility: [:public, :unlisted, :private]).includes(:preloadable_poll, :media_attachments, :account, reblog: :account).limit(limit)
  213. crutches = build_crutches(account.id, statuses)
  214. statuses.each do |status|
  215. next if filter_from_home?(status, account.id, crutches)
  216. add_to_feed(:home, account.id, status, aggregate_reblogs: aggregate)
  217. end
  218. trim(:home, account.id)
  219. end
  220. end
  221. # Completely clear multiple feeds at once
  222. # @param [Symbol] type
  223. # @param [Array<Integer>] ids
  224. # @return [void]
  225. def clean_feeds!(type, ids)
  226. reblogged_id_sets = {}
  227. redis.pipelined do
  228. ids.each do |feed_id|
  229. redis.del(key(type, feed_id))
  230. reblog_key = key(type, feed_id, 'reblogs')
  231. # We collect a future for this: we don't block while getting
  232. # it, but we can iterate over it later.
  233. reblogged_id_sets[feed_id] = redis.zrange(reblog_key, 0, -1)
  234. redis.del(reblog_key)
  235. end
  236. end
  237. # Remove all of the reblog tracking keys we just removed the
  238. # references to.
  239. redis.pipelined do
  240. reblogged_id_sets.each do |feed_id, future|
  241. future.value.each do |reblogged_id|
  242. reblog_set_key = key(type, feed_id, "reblogs:#{reblogged_id}")
  243. redis.del(reblog_set_key)
  244. end
  245. end
  246. end
  247. end
  248. private
  249. # Trim a feed to maximum size by removing older items
  250. # @param [Symbol] type
  251. # @param [Integer] timeline_id
  252. # @return [void]
  253. def trim(type, timeline_id)
  254. timeline_key = key(type, timeline_id)
  255. reblog_key = key(type, timeline_id, 'reblogs')
  256. # Remove any items past the MAX_ITEMS'th entry in our feed
  257. redis.zremrangebyrank(timeline_key, 0, -(FeedManager::MAX_ITEMS + 1))
  258. # Get the score of the REBLOG_FALLOFF'th item in our feed, and stop
  259. # tracking anything after it for deduplication purposes.
  260. falloff_rank = FeedManager::REBLOG_FALLOFF
  261. falloff_range = redis.zrevrange(timeline_key, falloff_rank, falloff_rank, with_scores: true)
  262. falloff_score = falloff_range&.first&.last&.to_i
  263. return if falloff_score.nil?
  264. # Get any reblogs we might have to clean up after.
  265. redis.zrangebyscore(reblog_key, 0, falloff_score).each do |reblogged_id|
  266. # Remove it from the set of reblogs we're tracking *first* to avoid races.
  267. redis.zrem(reblog_key, reblogged_id)
  268. # Just drop any set we might have created to track additional reblogs.
  269. # This means that if this reblog is deleted, we won't automatically insert
  270. # another reblog, but also that any new reblog can be inserted into the
  271. # feed.
  272. redis.del(key(type, timeline_id, "reblogs:#{reblogged_id}"))
  273. end
  274. end
  275. # Check if there is a streaming API client connected
  276. # for the given feed
  277. # @param [String] timeline_key
  278. # @return [Boolean]
  279. def push_update_required?(timeline_key)
  280. redis.exists?("subscribed:#{timeline_key}")
  281. end
  282. # Check if the account is blocking or muting any of the given accounts
  283. # @param [Integer] receiver_id
  284. # @param [Array<Integer>] account_ids
  285. # @param [Symbol] context
  286. def blocks_or_mutes?(receiver_id, account_ids, context)
  287. Block.where(account_id: receiver_id, target_account_id: account_ids).any? ||
  288. (context == :home ? Mute.where(account_id: receiver_id, target_account_id: account_ids).any? : Mute.where(account_id: receiver_id, target_account_id: account_ids, hide_notifications: true).any?)
  289. end
  290. # Check if status should not be added to the home feed
  291. # @param [Status] status
  292. # @param [Integer] receiver_id
  293. # @param [Hash] crutches
  294. # @return [Boolean]
  295. def filter_from_home?(status, receiver_id, crutches)
  296. return false if receiver_id == status.account_id
  297. return true if status.reply? && (status.in_reply_to_id.nil? || status.in_reply_to_account_id.nil?)
  298. return true if crutches[:languages][status.account_id].present? && status.language.present? && !crutches[:languages][status.account_id].include?(status.language)
  299. check_for_blocks = crutches[:active_mentions][status.id] || []
  300. check_for_blocks.concat([status.account_id])
  301. if status.reblog?
  302. check_for_blocks.concat([status.reblog.account_id])
  303. check_for_blocks.concat(crutches[:active_mentions][status.reblog_of_id] || [])
  304. end
  305. return true if check_for_blocks.any? { |target_account_id| crutches[:blocking][target_account_id] || crutches[:muting][target_account_id] }
  306. if status.reply? && !status.in_reply_to_account_id.nil? # Filter out if it's a reply
  307. should_filter = !crutches[:following][status.in_reply_to_account_id] # and I'm not following the person it's a reply to
  308. should_filter &&= receiver_id != status.in_reply_to_account_id # and it's not a reply to me
  309. should_filter &&= status.account_id != status.in_reply_to_account_id # and it's not a self-reply
  310. return !!should_filter
  311. elsif status.reblog? # Filter out a reblog
  312. should_filter = crutches[:hiding_reblogs][status.account_id] # if the reblogger's reblogs are suppressed
  313. should_filter ||= crutches[:blocked_by][status.reblog.account_id] # or if the author of the reblogged status is blocking me
  314. should_filter ||= crutches[:domain_blocking][status.reblog.account.domain] # or the author's domain is blocked
  315. return !!should_filter
  316. end
  317. false
  318. end
  319. # Check if status should not be added to the mentions feed
  320. # @see NotifyService
  321. # @param [Status] status
  322. # @param [Integer] receiver_id
  323. # @return [Boolean]
  324. def filter_from_mentions?(status, receiver_id)
  325. return true if receiver_id == status.account_id
  326. # This filter is called from NotifyService, but already after the sender of
  327. # the notification has been checked for mute/block. Therefore, it's not
  328. # necessary to check the author of the toot for mute/block again
  329. check_for_blocks = status.active_mentions.pluck(:account_id)
  330. check_for_blocks.concat([status.in_reply_to_account]) if status.reply? && !status.in_reply_to_account_id.nil?
  331. should_filter = blocks_or_mutes?(receiver_id, check_for_blocks, :mentions) # Filter if it's from someone I blocked, in reply to someone I blocked, or mentioning someone I blocked (or muted)
  332. should_filter ||= (status.account.silenced? && !Follow.where(account_id: receiver_id, target_account_id: status.account_id).exists?) # of if the account is silenced and I'm not following them
  333. should_filter
  334. end
  335. # Check if status should not be added to the list feed
  336. # @param [Status] status
  337. # @param [List] list
  338. # @return [Boolean]
  339. def filter_from_list?(status, list)
  340. if status.reply? && status.in_reply_to_account_id != status.account_id
  341. should_filter = status.in_reply_to_account_id != list.account_id
  342. should_filter &&= !list.show_followed?
  343. should_filter &&= !(list.show_list? && ListAccount.where(list_id: list.id, account_id: status.in_reply_to_account_id).exists?)
  344. return !!should_filter
  345. end
  346. false
  347. end
  348. # Check if a status should not be added to the home feed when it comes
  349. # from a followed hashtag
  350. # @param [Status] status
  351. # @param [Integer] receiver_id
  352. # @param [Hash] crutches
  353. # @return [Boolean]
  354. def filter_from_tags?(status, receiver_id, crutches)
  355. receiver_id == status.account_id || ((crutches[:active_mentions][status.id] || []) + [status.account_id]).any? { |target_account_id| crutches[:blocking][target_account_id] || crutches[:muting][target_account_id] } || crutches[:blocked_by][status.account_id] || crutches[:domain_blocking][status.account.domain]
  356. end
  357. # Adds a status to an account's feed, returning true if a status was
  358. # added, and false if it was not added to the feed. Note that this is
  359. # an internal helper: callers must call trim or push updates if
  360. # either action is appropriate.
  361. # @param [Symbol] timeline_type
  362. # @param [Integer] account_id
  363. # @param [Status] status
  364. # @param [Boolean] aggregate_reblogs
  365. # @return [Boolean]
  366. def add_to_feed(timeline_type, account_id, status, aggregate_reblogs: true)
  367. timeline_key = key(timeline_type, account_id)
  368. reblog_key = key(timeline_type, account_id, 'reblogs')
  369. if status.reblog? && (aggregate_reblogs.nil? || aggregate_reblogs)
  370. # If the original status or a reblog of it is within
  371. # REBLOG_FALLOFF statuses from the top, do not re-insert it into
  372. # the feed
  373. rank = redis.zrevrank(timeline_key, status.reblog_of_id)
  374. return false if !rank.nil? && rank < FeedManager::REBLOG_FALLOFF
  375. # The ordered set at `reblog_key` holds statuses which have a reblog
  376. # in the top `REBLOG_FALLOFF` statuses of the timeline
  377. if redis.zadd(reblog_key, status.id, status.reblog_of_id, nx: true)
  378. # This is not something we've already seen reblogged, so we
  379. # can just add it to the feed (and note that we're reblogging it).
  380. redis.zadd(timeline_key, status.id, status.id)
  381. else
  382. # Another reblog of the same status was already in the
  383. # REBLOG_FALLOFF most recent statuses, so we note that this
  384. # is an "extra" reblog, by storing it in reblog_set_key.
  385. reblog_set_key = key(timeline_type, account_id, "reblogs:#{status.reblog_of_id}")
  386. redis.sadd(reblog_set_key, status.id)
  387. return false
  388. end
  389. else
  390. # A reblog may reach earlier than the original status because of the
  391. # delay of the worker delivering the original status, the late addition
  392. # by merging timelines, and other reasons.
  393. # If such a reblog already exists, just do not re-insert it into the feed.
  394. return false unless redis.zscore(reblog_key, status.id).nil?
  395. redis.zadd(timeline_key, status.id, status.id)
  396. end
  397. true
  398. end
  399. # Removes an individual status from a feed, correctly handling cases
  400. # with reblogs, and returning true if a status was removed. As with
  401. # `add_to_feed`, this does not trigger push updates, so callers must
  402. # do so if appropriate.
  403. # @param [Symbol] timeline_type
  404. # @param [Integer] account_id
  405. # @param [Status] status
  406. # @param [Boolean] aggregate_reblogs
  407. # @return [Boolean]
  408. def remove_from_feed(timeline_type, account_id, status, aggregate_reblogs: true)
  409. timeline_key = key(timeline_type, account_id)
  410. reblog_key = key(timeline_type, account_id, 'reblogs')
  411. if status.reblog? && (aggregate_reblogs.nil? || aggregate_reblogs)
  412. # 1. If the reblogging status is not in the feed, stop.
  413. status_rank = redis.zrevrank(timeline_key, status.id)
  414. return false if status_rank.nil?
  415. # 2. Remove reblog from set of this status's reblogs.
  416. reblog_set_key = key(timeline_type, account_id, "reblogs:#{status.reblog_of_id}")
  417. redis.srem(reblog_set_key, status.id)
  418. redis.zrem(reblog_key, status.reblog_of_id)
  419. # 3. Re-insert another reblog or original into the feed if one
  420. # remains in the set. We could pick a random element, but this
  421. # set should generally be small, and it seems ideal to show the
  422. # oldest potential such reblog.
  423. other_reblog = redis.smembers(reblog_set_key).map(&:to_i).min
  424. redis.zadd(timeline_key, other_reblog, other_reblog) if other_reblog
  425. redis.zadd(reblog_key, other_reblog, status.reblog_of_id) if other_reblog
  426. # 4. Remove the reblogging status from the feed (as normal)
  427. # (outside conditional)
  428. else
  429. # If the original is getting deleted, no use for reblog references
  430. redis.del(key(timeline_type, account_id, "reblogs:#{status.id}"))
  431. redis.zrem(reblog_key, status.id)
  432. end
  433. redis.zrem(timeline_key, status.id)
  434. end
  435. # Pre-fetch various objects and relationships for given statuses that
  436. # are going to be checked by the filtering methods
  437. # @param [Integer] receiver_id
  438. # @param [Array<Status>] statuses
  439. # @return [Hash]
  440. def build_crutches(receiver_id, statuses)
  441. crutches = {}
  442. crutches[:active_mentions] = Mention.active.where(status_id: statuses.flat_map { |s| [s.id, s.reblog_of_id] }.compact).pluck(:status_id, :account_id).each_with_object({}) { |(id, account_id), mapping| (mapping[id] ||= []).push(account_id) }
  443. check_for_blocks = statuses.flat_map do |s|
  444. arr = crutches[:active_mentions][s.id] || []
  445. arr.concat([s.account_id])
  446. if s.reblog?
  447. arr.concat([s.reblog.account_id])
  448. arr.concat(crutches[:active_mentions][s.reblog_of_id] || [])
  449. end
  450. arr
  451. end
  452. crutches[:following] = Follow.where(account_id: receiver_id, target_account_id: statuses.map(&:in_reply_to_account_id).compact).pluck(:target_account_id).index_with(true)
  453. crutches[:languages] = Follow.where(account_id: receiver_id, target_account_id: statuses.map(&:account_id)).pluck(:target_account_id, :languages).to_h
  454. crutches[:hiding_reblogs] = Follow.where(account_id: receiver_id, target_account_id: statuses.map { |s| s.account_id if s.reblog? }.compact, show_reblogs: false).pluck(:target_account_id).index_with(true)
  455. crutches[:blocking] = Block.where(account_id: receiver_id, target_account_id: check_for_blocks).pluck(:target_account_id).index_with(true)
  456. crutches[:muting] = Mute.where(account_id: receiver_id, target_account_id: check_for_blocks).pluck(:target_account_id).index_with(true)
  457. crutches[:domain_blocking] = AccountDomainBlock.where(account_id: receiver_id, domain: statuses.flat_map { |s| [s.account.domain, s.reblog&.account&.domain] }.compact).pluck(:domain).index_with(true)
  458. crutches[:blocked_by] = Block.where(target_account_id: receiver_id, account_id: statuses.map { |s| s.reblog&.account_id }.compact).pluck(:account_id).index_with(true)
  459. crutches
  460. end
  461. end