1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
# frozen_string_literal: true
require 'singleton'
class FeedManager
include Singleton
MAX_ITEMS = 400
def key(type, id)
"feed:#{type}:#{id}"
end
def filter?(timeline_type, status, receiver_id)
if timeline_type == :home
filter_from_home?(status, receiver_id)
elsif timeline_type == :mentions
filter_from_mentions?(status, receiver_id)
else
false
end
end
def push(timeline_type, account, status)
timeline_key = key(timeline_type, account.id)
if status.reblog?
# If the original status is within 40 statuses from top, do not re-insert it into the feed
rank = redis.zrevrank(timeline_key, status.reblog_of_id)
return if !rank.nil? && rank < 40
redis.zadd(timeline_key, status.id, status.reblog_of_id)
else
redis.zadd(timeline_key, status.id, status.id)
trim(timeline_type, account.id)
end
broadcast(account.id, event: 'update', payload: inline_render(account, 'api/v1/statuses/show', status))
end
def broadcast(timeline_id, options = {})
options[:queued_at] = (Time.now.to_f * 1000.0).to_i
ActionCable.server.broadcast("timeline:#{timeline_id}", options)
end
def trim(type, account_id)
return unless redis.zcard(key(type, account_id)) > FeedManager::MAX_ITEMS
last = redis.zrevrange(key(type, account_id), FeedManager::MAX_ITEMS - 1, FeedManager::MAX_ITEMS - 1)
redis.zremrangebyscore(key(type, account_id), '-inf', "(#{last.last}")
end
def merge_into_timeline(from_account, into_account)
timeline_key = key(:home, into_account.id)
query = from_account.statuses.limit(FeedManager::MAX_ITEMS / 4)
if redis.zcard(timeline_key) >= FeedManager::MAX_ITEMS / 4
oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true)&.first&.last&.to_i || 0
query = query.where('id > ?', oldest_home_score)
end
redis.pipelined do
query.each do |status|
next if status.direct_visibility? || filter?(:home, status, into_account)
redis.zadd(timeline_key, status.id, status.id)
end
end
trim(:home, into_account.id)
end
def unmerge_from_timeline(from_account, into_account)
timeline_key = key(:home, into_account.id)
oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true)&.first&.last&.to_i || 0
from_account.statuses.select('id').where('id > ?', oldest_home_score).find_in_batches do |statuses|
redis.pipelined do
statuses.each do |status|
redis.zrem(timeline_key, status.id)
redis.zremrangebyscore(timeline_key, status.id, status.id)
end
end
end
end
def inline_render(target_account, template, object)
Rabl::Renderer.new(template, object, view_path: 'app/views', format: :json, scope: InlineRablScope.new(target_account)).render
end
private
def redis
Redis.current
end
def filter_from_home?(status, receiver_id)
return true if status.reply? && status.in_reply_to_id.nil?
check_for_mutes = [status.account_id]
check_for_mutes.concat([status.reblog.account_id]) if status.reblog?
return true if Mute.where(account_id: receiver_id, target_account_id: check_for_mutes).any?
check_for_blocks = status.mentions.map(&:account_id)
check_for_blocks.concat([status.reblog.account_id]) if status.reblog?
return true if Block.where(account_id: receiver_id, target_account_id: check_for_blocks).any?
if status.reply? && !status.in_reply_to_account_id.nil? # Filter out if it's a reply
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
should_filter &&= !(receiver_id == status.in_reply_to_account_id) # and it's not a reply to me
should_filter &&= !(status.account_id == status.in_reply_to_account_id) # and it's not a self-reply
return should_filter
elsif status.reblog? # Filter out a reblog
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
end
false
end
def filter_from_mentions?(status, receiver_id)
check_for_blocks = [status.account_id]
check_for_blocks.concat(status.mentions.select('account_id').map(&:account_id))
check_for_blocks.concat([status.in_reply_to_account]) if status.reply? && !status.in_reply_to_account_id.nil?
should_filter = receiver_id == status.account_id # Filter if I'm mentioning myself
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
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
should_filter
end
end
|
