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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
# frozen_string_literal: true
class RemoveStatusService < BaseService
include StreamEntryRenderer
include Redisable
MIN_SCHEDULE_OFFSET = 60.seconds.freeze
def call(status, **options)
@payload = Oj.dump(event: :delete, payload: status.id.to_s)
@status = status
@account = status.account
@tags = status.tags.pluck(:name).to_a
@mentions = status.active_mentions.includes(:account).to_a
@reblogs = status.reblogs.includes(:account).to_a
@stream_entry = status.stream_entry
@options = options
RedisLock.acquire(lock_options) do |lock|
if lock.acquired?
remove_from_self if status.account.local?
remove_from_followers
remove_from_lists
remove_from_affected
remove_reblogs
remove_from_hashtags
remove_from_public
remove_from_media if status.media_attachments.any?
remove_from_direct if status.direct_visibility?
@status.destroy!
else
raise Mastodon::RaceConditionError
end
end
# There is no reason to send out Undo activities when the
# cause is that the original object has been removed, since
# original object being removed implicitly removes reblogs
# of it. The Delete activity of the original is forwarded
# separately.
return if !@account.local? || @options[:original_removed]
remove_from_remote_followers
remove_from_remote_affected
end
private
def remove_from_self
FeedManager.instance.unpush_from_home(@account, @status)
end
def remove_from_followers
@account.followers_for_local_distribution.reorder(nil).find_each do |follower|
FeedManager.instance.unpush_from_home(follower, @status)
end
end
def remove_from_lists
@account.lists_for_local_distribution.select(:id, :account_id).reorder(nil).find_each do |list|
FeedManager.instance.unpush_from_list(list, @status)
end
end
def remove_from_affected
@mentions.map(&:account).select(&:local?).each do |account|
redis.publish("timeline:#{account.id}", @payload)
end
end
def remove_from_remote_affected
# People who got mentioned in the status, or who
# reblogged it from someone else might not follow
# the author and wouldn't normally receive the
# delete notification - so here, we explicitly
# send it to them
target_accounts = (@mentions.map(&:account).reject(&:local?) + @reblogs.map(&:account).reject(&:local?))
target_accounts << @status.reblog.account if @status.reblog? && !@status.reblog.account.local?
target_accounts.uniq!(&:id)
# Ostatus
NotificationWorker.push_bulk(target_accounts.select(&:ostatus?).uniq(&:domain)) do |target_account|
[salmon_xml, @account.id, target_account.id]
end
# ActivityPub
ActivityPub::DeliveryWorker.push_bulk(target_accounts.select(&:activitypub?).uniq(&:preferred_inbox_url)) do |target_account|
[signed_activity_json, @account.id, target_account.preferred_inbox_url]
end
end
def remove_from_remote_followers
# OStatus
Pubsubhubbub::RawDistributionWorker.perform_async(salmon_xml, @account.id)
# ActivityPub
ActivityPub::DeliveryWorker.push_bulk(@account.followers.inboxes) do |inbox_url|
[signed_activity_json, @account.id, inbox_url]
end
relay! if relayable?
end
def relayable?
@status.public_visibility?
end
def relay!
ActivityPub::DeliveryWorker.push_bulk(Relay.enabled.pluck(:inbox_url)) do |inbox_url|
[signed_activity_json, @account.id, inbox_url]
end
end
def salmon_xml
@salmon_xml ||= stream_entry_to_xml(@stream_entry)
end
def signed_activity_json
@signed_activity_json ||= Oj.dump(ActivityPub::LinkedDataSignature.new(activity_json).sign!(@account))
end
def activity_json
@activity_json ||= ActiveModelSerializers::SerializableResource.new(
@status,
serializer: @status.reblog? ? ActivityPub::UndoAnnounceSerializer : ActivityPub::DeleteSerializer,
adapter: ActivityPub::Adapter
).as_json
end
def remove_reblogs
# We delete reblogs of the status before the original status,
# because once original status is gone, reblogs will disappear
# without us being able to do all the fancy stuff
@reblogs.each do |reblog|
RemoveStatusService.new.call(reblog, original_removed: true)
end
end
def remove_from_hashtags
@account.featured_tags.where(tag_id: @status.tags.pluck(:id)).each do |featured_tag|
featured_tag.decrement(@status.id)
end
return unless @status.public_visibility?
@tags.each do |hashtag|
redis.publish("timeline:hashtag:#{hashtag}", @payload)
redis.publish("timeline:hashtag:#{hashtag}:local", @payload) if @status.local?
end
end
def remove_from_public
return unless @status.public_visibility?
redis.publish('timeline:public', @payload)
redis.publish('timeline:public:local', @payload) if @status.local?
end
def remove_from_media
return unless @status.public_visibility?
redis.publish('timeline:public:media', @payload)
redis.publish('timeline:public:local:media', @payload) if @status.local?
end
def remove_from_direct
@mentions.each do |mention|
Redis.current.publish("timeline:direct:#{mention.account.id}", @payload) if mention.account.local?
end
Redis.current.publish("timeline:direct:#{@account.id}", @payload) if @account.local?
end
def lock_options
{ redis: Redis.current, key: "distribute:#{@status.id}" }
end
end
|
