122 lines
4.8 KiB
Ruby
122 lines
4.8 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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MAX_ITEMS = 400
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def key(type, id)
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"feed:#{type}:#{id}"
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end
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def filter?(timeline_type, status, receiver_id)
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if timeline_type == :home
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filter_from_home?(status, receiver_id)
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elsif timeline_type == :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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def push(timeline_type, account, status)
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timeline_key = key(timeline_type, account.id)
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if status.reblog?
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# If the original status is within 40 statuses from top, do not re-insert it into the feed
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rank = redis.zrevrank(timeline_key, status.reblog_of_id)
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return if !rank.nil? && rank < 40
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redis.zadd(timeline_key, status.id, status.reblog_of_id)
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else
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redis.zadd(timeline_key, status.id, status.id)
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trim(timeline_type, account.id)
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end
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PushUpdateWorker.perform_async(account.id, status.id)
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end
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def trim(type, account_id)
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return unless redis.zcard(key(type, account_id)) > FeedManager::MAX_ITEMS
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last = redis.zrevrange(key(type, account_id), FeedManager::MAX_ITEMS - 1, FeedManager::MAX_ITEMS - 1)
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redis.zremrangebyscore(key(type, account_id), '-inf', "(#{last.last}")
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end
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def merge_into_timeline(from_account, into_account)
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timeline_key = key(:home, into_account.id)
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query = from_account.statuses.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 || 0
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query = query.where('id > ?', oldest_home_score)
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end
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redis.pipelined do
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query.each do |status|
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next if status.direct_visibility? || filter?(:home, status, into_account)
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redis.zadd(timeline_key, status.id, status.id)
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end
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end
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trim(:home, into_account.id)
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end
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def unmerge_from_timeline(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').where('id > ?', oldest_home_score).reorder(nil).find_in_batches do |statuses|
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redis.pipelined do
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statuses.each do |status|
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redis.zrem(timeline_key, status.id)
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redis.zremrangebyscore(timeline_key, status.id, status.id)
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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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def redis
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Redis.current
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end
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def filter_from_home?(status, receiver_id)
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return true if status.reply? && status.in_reply_to_id.nil?
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check_for_mutes = [status.account_id]
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check_for_mutes.concat([status.reblog.account_id]) if status.reblog?
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return true if Mute.where(account_id: receiver_id, target_account_id: check_for_mutes).any?
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check_for_blocks = status.mentions.map(&:account_id)
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check_for_blocks.concat([status.reblog.account_id]) if status.reblog?
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return true if Block.where(account_id: receiver_id, target_account_id: check_for_blocks).any?
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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 = !Follow.where(account_id: receiver_id, target_account_id: status.in_reply_to_account_id).exists? # 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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return Block.where(account_id: status.reblog.account_id, target_account_id: receiver_id).exists? # or if the author of the reblogged status is blocking me
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end
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false
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end
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def filter_from_mentions?(status, receiver_id)
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check_for_blocks = [status.account_id]
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check_for_blocks.concat(status.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 = receiver_id == status.account_id # Filter if I'm mentioning myself
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should_filter ||= Block.where(account_id: receiver_id, target_account_id: check_for_blocks).any? # or it's from someone I blocked, in reply to someone I blocked, or mentioning someone I blocked
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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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end
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