diff options
Diffstat (limited to 'app/lib')
| -rw-r--r-- | app/lib/feed_manager.rb | 49 |
1 files changed, 31 insertions, 18 deletions
diff --git a/app/lib/feed_manager.rb b/app/lib/feed_manager.rb index 7f95d7784..58650efb6 100644 --- a/app/lib/feed_manager.rb +++ b/app/lib/feed_manager.rb @@ -56,7 +56,17 @@ class FeedManager falloff_rank = FeedManager::REBLOG_FALLOFF - 1 falloff_range = redis.zrevrange(timeline_key, falloff_rank, falloff_rank, with_scores: true) falloff_score = falloff_range&.first&.last&.to_i || 0 - redis.zremrangebyscore(reblog_key, 0, falloff_score) + + # Get any reblogs we might have to clean up after. + redis.zrangebyscore(reblog_key, 0, falloff_score).each do |reblogged_id| + # Remove it from the set of reblogs we're tracking *first* to avoid races. + redis.zrem(reblog_key, reblogged_id) + # Just drop any set we might have created to track additional reblogs. + # This means that if this reblog is deleted, we won't automatically insert + # another reblog, but also that any new reblog can be inserted into the + # feed. + redis.del(key(type, account_id, "reblogs:#{reblogged_id}")) + end end def push_update_required?(timeline_type, account_id) @@ -177,23 +187,28 @@ class FeedManager reblog_key = key(timeline_type, account.id, 'reblogs') if status.reblog? - reblog_set_key = key(timeline_type, account.id, "reblogs:#{status.reblog_of_id}") - # 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) - redis.sadd(reblog_set_key, status.reblog_of_id) unless rank.nil? - redis.sadd(reblog_set_key, status.id) - return false if !rank.nil? && rank < FeedManager::REBLOG_FALLOFF reblog_rank = redis.zrevrank(reblog_key, status.reblog_of_id) - return false unless reblog_rank.nil? - - redis.zadd(timeline_key, status.id, status.id) - redis.zadd(reblog_key, status.id, status.reblog_of_id) + if reblog_rank.nil? + # 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) + redis.zadd(reblog_key, status.id, status.reblog_of_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 redis.zadd(timeline_key, status.id, status.id) end @@ -207,23 +222,21 @@ class FeedManager # do so if appropriate. def remove_from_feed(timeline_type, account, status) timeline_key = key(timeline_type, account.id) - reblog_key = key(timeline_type, account.id, 'reblogs') if status.reblog? # 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 the reblogged status from the `:reblogs` zset. - redis.zrem(reblog_key, status.reblog_of_id) - - # 3. Remove reblog from set of this status's reblogs, and - # re-insert another reblog or original into the feed if - # one remains in the set + # 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) - other_reblog = redis.srandmember(reblog_set_key) + # 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).sort.first redis.zadd(timeline_key, other_reblog, other_reblog) if other_reblog |