forked from fedi/mastodon
cbd0ee1d07
* Update devise-two-factor to unreleased fork for Rails 6 support Update tests to match new `rotp` version. * Update nsa gem to unreleased fork for Rails 6 support * Update rails to 6.1.3 and rails-i18n to 6.0 * Update to unreleased fork of pluck_each for Ruby 6 support * Run "rails app:update" * Add missing ActiveStorage config file * Use config.ssl_options instead of removed ApplicationController#force_ssl Disabled force_ssl-related tests as they do not seem to be easily testable anymore. * Fix nonce directives by removing Rails 5 specific monkey-patching * Fix fixture_file_upload deprecation warning * Fix yield-based test failing with Rails 6 * Use Rails 6's index_with when possible * Use ActiveRecord::Cache::Store#delete_multi from Rails 6 This will yield better performances when deleting an account * Disable Rails 6.1's automatic preload link headers Since Rails 6.1, ActionView adds preload links for javascript files in the Links header per default. In our case, that will bloat headers too much and potentially cause issues with reverse proxies. Furhermore, we don't need those links, as we already output them as HTML link tags. * Switch to Rails 6.0 default config * Switch to Rails 6.1 default config * Do not include autoload paths in the load path
546 lines
22 KiB
Ruby
546 lines
22 KiB
Ruby
# frozen_string_literal: true
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require 'singleton'
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class FeedManager
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include Singleton
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include Redisable
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# Maximum number of items stored in a single feed
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MAX_ITEMS = 400
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# Number of items in the feed since last reblog of status
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# before the new reblog will be inserted. Must be <= MAX_ITEMS
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# or the tracking sets will grow forever
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REBLOG_FALLOFF = 40
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# Execute block for every active account
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# @yield [Account]
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# @return [void]
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def with_active_accounts(&block)
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Account.joins(:user).where('users.current_sign_in_at > ?', User::ACTIVE_DURATION.ago).find_each(&block)
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end
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# Redis key of a feed
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# @param [Symbol] type
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# @param [Integer] id
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# @param [Symbol] subtype
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# @return [String]
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def key(type, id, subtype = nil)
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return "feed:#{type}:#{id}" unless subtype
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"feed:#{type}:#{id}:#{subtype}"
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end
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# Check if the status should not be added to a feed
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# @param [Symbol] timeline_type
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# @param [Status] status
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# @param [Account|List] receiver
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# @return [Boolean]
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def filter?(timeline_type, status, receiver)
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case timeline_type
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when :home
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filter_from_home?(status, receiver.id, build_crutches(receiver.id, [status]))
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when :list
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filter_from_list?(status, receiver) || filter_from_home?(status, receiver.account_id, build_crutches(receiver.account_id, [status]))
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when :mentions
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filter_from_mentions?(status, receiver.id)
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else
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false
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end
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end
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# Add a status to a home feed and send a streaming API update
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# @param [Account] account
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# @param [Status] status
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# @return [Boolean]
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def push_to_home(account, status)
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return false unless add_to_feed(:home, account.id, status, account.user&.aggregates_reblogs?)
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trim(:home, account.id)
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PushUpdateWorker.perform_async(account.id, status.id, "timeline:#{account.id}") if push_update_required?("timeline:#{account.id}")
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true
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end
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# Remove a status from a home feed and send a streaming API update
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# @param [Account] account
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# @param [Status] status
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# @return [Boolean]
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def unpush_from_home(account, status)
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return false unless remove_from_feed(:home, account.id, status, account.user&.aggregates_reblogs?)
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redis.publish("timeline:#{account.id}", Oj.dump(event: :delete, payload: status.id.to_s))
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true
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end
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# Add a status to a list feed and send a streaming API update
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# @param [List] list
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# @param [Status] status
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# @return [Boolean]
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def push_to_list(list, status)
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return false if filter_from_list?(status, list) || !add_to_feed(:list, list.id, status, list.account.user&.aggregates_reblogs?)
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trim(:list, list.id)
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PushUpdateWorker.perform_async(list.account_id, status.id, "timeline:list:#{list.id}") if push_update_required?("timeline:list:#{list.id}")
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true
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end
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# Remove a status from a list feed and send a streaming API update
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# @param [List] list
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# @param [Status] status
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# @return [Boolean]
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def unpush_from_list(list, status)
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return false unless remove_from_feed(:list, list.id, status, list.account.user&.aggregates_reblogs?)
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redis.publish("timeline:list:#{list.id}", Oj.dump(event: :delete, payload: status.id.to_s))
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true
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end
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# Fill a home feed with an account's statuses
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# @param [Account] from_account
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# @param [Account] into_account
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# @return [void]
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def merge_into_home(from_account, into_account)
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timeline_key = key(:home, into_account.id)
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aggregate = into_account.user&.aggregates_reblogs?
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query = from_account.statuses.where(visibility: [:public, :unlisted, :private]).includes(:preloadable_poll, reblog: :account).limit(FeedManager::MAX_ITEMS / 4)
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if redis.zcard(timeline_key) >= FeedManager::MAX_ITEMS / 4
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oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true).first.last.to_i
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query = query.where('id > ?', oldest_home_score)
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end
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statuses = query.to_a
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crutches = build_crutches(into_account.id, statuses)
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statuses.each do |status|
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next if filter_from_home?(status, into_account.id, crutches)
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add_to_feed(:home, into_account.id, status, aggregate)
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end
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trim(:home, into_account.id)
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end
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# Fill a list feed with an account's statuses
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# @param [Account] from_account
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# @param [List] list
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# @return [void]
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def merge_into_list(from_account, list)
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timeline_key = key(:list, list.id)
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aggregate = list.account.user&.aggregates_reblogs?
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query = from_account.statuses.where(visibility: [:public, :unlisted, :private]).includes(:preloadable_poll, reblog: :account).limit(FeedManager::MAX_ITEMS / 4)
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if redis.zcard(timeline_key) >= FeedManager::MAX_ITEMS / 4
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oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true).first.last.to_i
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query = query.where('id > ?', oldest_home_score)
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end
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statuses = query.to_a
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crutches = build_crutches(list.account_id, statuses)
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statuses.each do |status|
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next if filter_from_home?(status, list.account_id, crutches) || filter_from_list?(status, list)
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add_to_feed(:list, list.id, status, aggregate)
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end
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trim(:list, list.id)
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end
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# Remove an account's statuses from a home feed
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# @param [Account] from_account
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# @param [Account] into_account
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# @return [void]
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def unmerge_from_home(from_account, into_account)
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timeline_key = key(:home, into_account.id)
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oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true)&.first&.last&.to_i || 0
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from_account.statuses.select('id, reblog_of_id').where('id > ?', oldest_home_score).reorder(nil).find_each do |status|
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remove_from_feed(:home, into_account.id, status, into_account.user&.aggregates_reblogs?)
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end
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end
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# Remove an account's statuses from a list feed
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# @param [Account] from_account
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# @param [List] list
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# @return [void]
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def unmerge_from_list(from_account, list)
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timeline_key = key(:list, list.id)
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oldest_list_score = redis.zrange(timeline_key, 0, 0, with_scores: true)&.first&.last&.to_i || 0
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from_account.statuses.select('id, reblog_of_id').where('id > ?', oldest_list_score).reorder(nil).find_each do |status|
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remove_from_feed(:list, list.id, status, list.account.user&.aggregates_reblogs?)
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end
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end
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# Clear all statuses from or mentioning target_account from a home feed
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# @param [Account] account
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# @param [Account] target_account
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# @return [void]
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def clear_from_home(account, target_account)
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timeline_key = key(:home, account.id)
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timeline_status_ids = redis.zrange(timeline_key, 0, -1)
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statuses = Status.where(id: timeline_status_ids).select(:id, :reblog_of_id, :account_id).to_a
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reblogged_ids = Status.where(id: statuses.map(&:reblog_of_id).compact, account: target_account).pluck(:id)
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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)
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target_statuses = statuses.select do |status|
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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)
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end
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target_statuses.each do |status|
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unpush_from_home(account, status)
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end
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end
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# Populate home feed of account from scratch
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# @param [Account] account
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# @return [void]
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def populate_home(account)
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limit = FeedManager::MAX_ITEMS / 2
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aggregate = account.user&.aggregates_reblogs?
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timeline_key = key(:home, account.id)
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account.statuses.limit(limit).each do |status|
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add_to_feed(:home, account.id, status, aggregate)
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end
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account.following.includes(:account_stat).find_each do |target_account|
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if redis.zcard(timeline_key) >= limit
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oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true).first.last.to_i
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last_status_score = Mastodon::Snowflake.id_at(account.last_status_at)
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# If the feed is full and this account has not posted more recently
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# than the last item on the feed, then we can skip the whole account
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# because none of its statuses would stay on the feed anyway
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next if last_status_score < oldest_home_score
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end
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statuses = target_account.statuses.where(visibility: [:public, :unlisted, :private]).includes(:preloadable_poll, reblog: :account).limit(limit)
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crutches = build_crutches(account.id, statuses)
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statuses.each do |status|
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next if filter_from_home?(status, account.id, crutches)
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add_to_feed(:home, account.id, status, aggregate)
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end
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trim(:home, account.id)
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end
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end
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# Completely clear multiple feeds at once
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# @param [Symbol] type
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# @param [Array<Integer>] ids
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# @return [void]
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def clean_feeds!(type, ids)
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reblogged_id_sets = {}
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redis.pipelined do
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ids.each do |feed_id|
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redis.del(key(type, feed_id))
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reblog_key = key(type, feed_id, 'reblogs')
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# We collect a future for this: we don't block while getting
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# it, but we can iterate over it later.
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reblogged_id_sets[feed_id] = redis.zrange(reblog_key, 0, -1)
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redis.del(reblog_key)
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end
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end
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# Remove all of the reblog tracking keys we just removed the
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# references to.
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redis.pipelined do
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reblogged_id_sets.each do |feed_id, future|
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future.value.each do |reblogged_id|
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reblog_set_key = key(type, feed_id, "reblogs:#{reblogged_id}")
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redis.del(reblog_set_key)
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end
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end
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end
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end
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private
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# Trim a feed to maximum size by removing older items
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# @param [Symbol] type
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# @param [Integer] timeline_id
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# @return [void]
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def trim(type, timeline_id)
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timeline_key = key(type, timeline_id)
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reblog_key = key(type, timeline_id, 'reblogs')
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# Remove any items past the MAX_ITEMS'th entry in our feed
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redis.zremrangebyrank(timeline_key, 0, -(FeedManager::MAX_ITEMS + 1))
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# Get the score of the REBLOG_FALLOFF'th item in our feed, and stop
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# tracking anything after it for deduplication purposes.
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falloff_rank = FeedManager::REBLOG_FALLOFF
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falloff_range = redis.zrevrange(timeline_key, falloff_rank, falloff_rank, with_scores: true)
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falloff_score = falloff_range&.first&.last&.to_i
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return if falloff_score.nil?
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# Get any reblogs we might have to clean up after.
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redis.zrangebyscore(reblog_key, 0, falloff_score).each do |reblogged_id|
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# Remove it from the set of reblogs we're tracking *first* to avoid races.
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redis.zrem(reblog_key, reblogged_id)
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# Just drop any set we might have created to track additional reblogs.
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# This means that if this reblog is deleted, we won't automatically insert
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# another reblog, but also that any new reblog can be inserted into the
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# feed.
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redis.del(key(type, timeline_id, "reblogs:#{reblogged_id}"))
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end
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end
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# Check if there is a streaming API client connected
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# for the given feed
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# @param [String] timeline_key
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# @return [Boolean]
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def push_update_required?(timeline_key)
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redis.exists?("subscribed:#{timeline_key}")
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end
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# Check if the account is blocking or muting any of the given accounts
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# @param [Integer] receiver_id
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# @param [Array<Integer>] account_ids
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# @param [Symbol] context
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def blocks_or_mutes?(receiver_id, account_ids, context)
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Block.where(account_id: receiver_id, target_account_id: account_ids).any? ||
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(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?)
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end
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# Check if status should not be added to the home feed
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# @param [Status] status
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# @param [Integer] receiver_id
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# @param [Hash] crutches
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# @return [Boolean]
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def filter_from_home?(status, receiver_id, crutches)
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return false if receiver_id == status.account_id
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return true if status.reply? && (status.in_reply_to_id.nil? || status.in_reply_to_account_id.nil?)
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return true if phrase_filtered?(status, receiver_id, :home)
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check_for_blocks = crutches[:active_mentions][status.id] || []
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check_for_blocks.concat([status.account_id])
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if status.reblog?
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check_for_blocks.concat([status.reblog.account_id])
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check_for_blocks.concat(crutches[:active_mentions][status.reblog_of_id] || [])
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end
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return true if check_for_blocks.any? { |target_account_id| crutches[:blocking][target_account_id] || crutches[:muting][target_account_id] }
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if status.reply? && !status.in_reply_to_account_id.nil? # Filter out if it's a reply
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should_filter = !crutches[:following][status.in_reply_to_account_id] # and I'm not following the person it's a reply to
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should_filter &&= receiver_id != status.in_reply_to_account_id # and it's not a reply to me
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should_filter &&= status.account_id != status.in_reply_to_account_id # and it's not a self-reply
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return !!should_filter
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elsif status.reblog? # Filter out a reblog
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should_filter = crutches[:hiding_reblogs][status.account_id] # if the reblogger's reblogs are suppressed
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should_filter ||= crutches[:blocked_by][status.reblog.account_id] # or if the author of the reblogged status is blocking me
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should_filter ||= crutches[:domain_blocking][status.reblog.account.domain] # or the author's domain is blocked
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return !!should_filter
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end
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false
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end
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# Check if status should not be added to the mentions feed
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# @see NotifyService
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# @param [Status] status
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# @param [Integer] receiver_id
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# @return [Boolean]
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def filter_from_mentions?(status, receiver_id)
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return true if receiver_id == status.account_id
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return true if phrase_filtered?(status, receiver_id, :notifications)
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# This filter is called from NotifyService, but already after the sender of
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# the notification has been checked for mute/block. Therefore, it's not
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# necessary to check the author of the toot for mute/block again
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check_for_blocks = status.active_mentions.pluck(:account_id)
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check_for_blocks.concat([status.in_reply_to_account]) if status.reply? && !status.in_reply_to_account_id.nil?
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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)
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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
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should_filter
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end
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# Check if status should not be added to the list feed
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# @param [Status] status
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# @param [List] list
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# @return [Boolean]
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def filter_from_list?(status, list)
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if status.reply? && status.in_reply_to_account_id != status.account_id
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should_filter = status.in_reply_to_account_id != list.account_id
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should_filter &&= !list.show_followed?
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should_filter &&= !(list.show_list? && ListAccount.where(list_id: list.id, account_id: status.in_reply_to_account_id).exists?)
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return !!should_filter
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end
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false
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end
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# Check if the status hits a phrase filter
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# @param [Status] status
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# @param [Integer] receiver_id
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# @param [Symbol] context
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# @return [Boolean]
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def phrase_filtered?(status, receiver_id, context)
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active_filters = Rails.cache.fetch("filters:#{receiver_id}") { CustomFilter.where(account_id: receiver_id).active_irreversible.to_a }.to_a
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active_filters.select! { |filter| filter.context.include?(context.to_s) && !filter.expired? }
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active_filters.map! do |filter|
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if filter.whole_word
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sb = /\A[[:word:]]/.match?(filter.phrase) ? '\b' : ''
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eb = /[[:word:]]\z/.match?(filter.phrase) ? '\b' : ''
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/(?mix:#{sb}#{Regexp.escape(filter.phrase)}#{eb})/
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else
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/#{Regexp.escape(filter.phrase)}/i
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end
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end
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return false if active_filters.empty?
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combined_regex = active_filters.reduce { |memo, obj| Regexp.union(memo, obj) }
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status = status.reblog if status.reblog?
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combined_text = [
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Formatter.instance.plaintext(status),
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status.spoiler_text,
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status.preloadable_poll ? status.preloadable_poll.options.join("\n\n") : nil,
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status.media_attachments.map(&:description).join("\n\n"),
|
|
].compact.join("\n\n")
|
|
|
|
combined_regex.match?(combined_text)
|
|
end
|
|
|
|
# Adds a status to an account's feed, returning true if a status was
|
|
# added, and false if it was not added to the feed. Note that this is
|
|
# an internal helper: callers must call trim or push updates if
|
|
# either action is appropriate.
|
|
# @param [Symbol] timeline_type
|
|
# @param [Integer] account_id
|
|
# @param [Status] status
|
|
# @param [Boolean] aggregate_reblogs
|
|
# @return [Boolean]
|
|
def add_to_feed(timeline_type, account_id, status, aggregate_reblogs = true)
|
|
timeline_key = key(timeline_type, account_id)
|
|
reblog_key = key(timeline_type, account_id, 'reblogs')
|
|
|
|
if status.reblog? && (aggregate_reblogs.nil? || aggregate_reblogs)
|
|
# If the original status or a reblog of it is within
|
|
# REBLOG_FALLOFF statuses from the top, do not re-insert it into
|
|
# the feed
|
|
rank = redis.zrevrank(timeline_key, status.reblog_of_id)
|
|
|
|
return false if !rank.nil? && rank < FeedManager::REBLOG_FALLOFF
|
|
|
|
# The ordered set at `reblog_key` holds statuses which have a reblog
|
|
# in the top `REBLOG_FALLOFF` statuses of the timeline
|
|
if redis.zadd(reblog_key, status.id, status.reblog_of_id, nx: true)
|
|
# This is not something we've already seen reblogged, so we
|
|
# can just add it to the feed (and note that we're reblogging it).
|
|
redis.zadd(timeline_key, status.id, status.id)
|
|
else
|
|
# Another reblog of the same status was already in the
|
|
# REBLOG_FALLOFF most recent statuses, so we note that this
|
|
# is an "extra" reblog, by storing it in reblog_set_key.
|
|
reblog_set_key = key(timeline_type, account_id, "reblogs:#{status.reblog_of_id}")
|
|
redis.sadd(reblog_set_key, status.id)
|
|
return false
|
|
end
|
|
else
|
|
# A reblog may reach earlier than the original status because of the
|
|
# delay of the worker deliverying the original status, the late addition
|
|
# by merging timelines, and other reasons.
|
|
# If such a reblog already exists, just do not re-insert it into the feed.
|
|
return false unless redis.zscore(reblog_key, status.id).nil?
|
|
|
|
redis.zadd(timeline_key, status.id, status.id)
|
|
end
|
|
|
|
true
|
|
end
|
|
|
|
# Removes an individual status from a feed, correctly handling cases
|
|
# with reblogs, and returning true if a status was removed. As with
|
|
# `add_to_feed`, this does not trigger push updates, so callers must
|
|
# do so if appropriate.
|
|
# @param [Symbol] timeline_type
|
|
# @param [Integer] account_id
|
|
# @param [Status] status
|
|
# @param [Boolean] aggregate_reblogs
|
|
# @return [Boolean]
|
|
def remove_from_feed(timeline_type, account_id, status, aggregate_reblogs = true)
|
|
timeline_key = key(timeline_type, account_id)
|
|
reblog_key = key(timeline_type, account_id, 'reblogs')
|
|
|
|
if status.reblog? && (aggregate_reblogs.nil? || aggregate_reblogs)
|
|
# 1. If the reblogging status is not in the feed, stop.
|
|
status_rank = redis.zrevrank(timeline_key, status.id)
|
|
return false if status_rank.nil?
|
|
|
|
# 2. Remove reblog from set of this status's reblogs.
|
|
reblog_set_key = key(timeline_type, account_id, "reblogs:#{status.reblog_of_id}")
|
|
|
|
redis.srem(reblog_set_key, status.id)
|
|
redis.zrem(reblog_key, status.reblog_of_id)
|
|
# 3. Re-insert another reblog or original into the feed if one
|
|
# remains in the set. We could pick a random element, but this
|
|
# set should generally be small, and it seems ideal to show the
|
|
# oldest potential such reblog.
|
|
other_reblog = redis.smembers(reblog_set_key).map(&:to_i).min
|
|
|
|
redis.zadd(timeline_key, other_reblog, other_reblog) if other_reblog
|
|
redis.zadd(reblog_key, other_reblog, status.reblog_of_id) if other_reblog
|
|
|
|
# 4. Remove the reblogging status from the feed (as normal)
|
|
# (outside conditional)
|
|
else
|
|
# If the original is getting deleted, no use for reblog references
|
|
redis.del(key(timeline_type, account_id, "reblogs:#{status.id}"))
|
|
redis.zrem(reblog_key, status.id)
|
|
end
|
|
|
|
redis.zrem(timeline_key, status.id)
|
|
end
|
|
|
|
# Pre-fetch various objects and relationships for given statuses that
|
|
# are going to be checked by the filtering methods
|
|
# @param [Integer] receiver_id
|
|
# @param [Array<Status>] statuses
|
|
# @return [Hash]
|
|
def build_crutches(receiver_id, statuses)
|
|
crutches = {}
|
|
|
|
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) }
|
|
|
|
check_for_blocks = statuses.flat_map do |s|
|
|
arr = crutches[:active_mentions][s.id] || []
|
|
arr.concat([s.account_id])
|
|
|
|
if s.reblog?
|
|
arr.concat([s.reblog.account_id])
|
|
arr.concat(crutches[:active_mentions][s.reblog_of_id] || [])
|
|
end
|
|
|
|
arr
|
|
end
|
|
|
|
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)
|
|
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)
|
|
crutches[:blocking] = Block.where(account_id: receiver_id, target_account_id: check_for_blocks).pluck(:target_account_id).index_with(true)
|
|
crutches[:muting] = Mute.where(account_id: receiver_id, target_account_id: check_for_blocks).pluck(:target_account_id).index_with(true)
|
|
crutches[:domain_blocking] = AccountDomainBlock.where(account_id: receiver_id, domain: statuses.map { |s| s.reblog&.account&.domain }.compact).pluck(:domain).index_with(true)
|
|
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)
|
|
|
|
crutches
|
|
end
|
|
end
|