about summary refs log tree commit diff
path: root/app/services/fan_out_on_write_service.rb
blob: 169a2411d97c59dd24b46a93c7cbbdfd76c7e5f4 (plain) (blame)
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
# frozen_string_literal: true

class FanOutOnWriteService < BaseService
  # Push a status into home and mentions feeds
  # @param [Status] status
  # @param [Hash] options
  # @option options [Boolean] update
  # @option options [Array<Integer>] silenced_account_ids
  def call(status, options = {})
    @status    = status
    @account   = status.account
    @options   = options

    check_race_condition!

    fan_out_to_local_recipients!
    fan_out_to_public_streams! if broadcastable?
  end

  private

  def check_race_condition!
    # I don't know why but at some point we had an issue where
    # this service was being executed with status objects
    # that had a null visibility - which should not be possible
    # since the column in the database is not nullable.
    #
    # This check re-queues the service to be run at a later time
    # with the full object, if something like it occurs

    raise Mastodon::RaceConditionError if @status.visibility.nil?
  end

  def fan_out_to_local_recipients!
    deliver_to_self!
    notify_mentioned_accounts!

    case @status.visibility.to_sym
    when :public, :unlisted, :private
      deliver_to_all_followers!
      deliver_to_lists!
    when :limited
      deliver_to_mentioned_followers!
    else
      deliver_to_mentioned_followers!
      deliver_to_conversation!
      deliver_to_direct_timelines!
    end
  end

  def fan_out_to_public_streams!
    broadcast_to_hashtag_streams!
    broadcast_to_public_streams!
  end

  def deliver_to_self!
    FeedManager.instance.push_to_home(@account, @status, update: update?) if @account.local?
    FeedManager.instance.push_to_direct(@account, @status, update: update?) if @account.local? && @status.direct_visibility?
  end

  def notify_mentioned_accounts!
    @status.active_mentions.where.not(id: @options[:silenced_account_ids] || []).joins(:account).merge(Account.local).select(:id, :account_id).reorder(nil).find_in_batches do |mentions|
      LocalNotificationWorker.push_bulk(mentions) do |mention|
        [mention.account_id, mention.id, 'Mention', :mention]
      end
    end
  end

  def deliver_to_all_followers!
    @account.followers_for_local_distribution.select(:id).reorder(nil).find_in_batches do |followers|
      FeedInsertWorker.push_bulk(followers) do |follower|
        [@status.id, follower.id, :home, update: update?]
      end
    end
  end

  def deliver_to_lists!
    @account.lists_for_local_distribution.select(:id).reorder(nil).find_in_batches do |lists|
      FeedInsertWorker.push_bulk(lists) do |list|
        [@status.id, list.id, :list, update: update?]
      end
    end
  end

  def deliver_to_mentioned_followers!
    @status.mentions.joins(:account).merge(@account.followers_for_local_distribution).select(:id, :account_id).reorder(nil).find_in_batches do |mentions|
      FeedInsertWorker.push_bulk(mentions) do |mention|
        [@status.id, mention.account_id, :home, update: update?]
      end
    end
  end

  def deliver_to_direct_timelines!
    FeedInsertWorker.push_bulk(@status.mentions.includes(:account).map(&:account).select { |mentioned_account| mentioned_account.local? }) do |account|
      [@status.id, account.id, :direct, update: update?]
    end
  end

  def broadcast_to_hashtag_streams!
    @status.tags.pluck(:name).each do |hashtag|
      Redis.current.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}", anonymous_payload)
      Redis.current.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}:local", anonymous_payload) if @status.local?
    end
  end

  def broadcast_to_public_streams!
    return if @status.reply? && @status.in_reply_to_account_id != @account.id && !Setting.show_replies_in_public_timelines

    Redis.current.publish('timeline:public', anonymous_payload)
    Redis.current.publish(@status.local? ? 'timeline:public:local' : 'timeline:public:remote', anonymous_payload)

    if @status.media_attachments.any?
      Redis.current.publish('timeline:public:media', anonymous_payload)
      Redis.current.publish(@status.local? ? 'timeline:public:local:media' : 'timeline:public:remote:media', anonymous_payload)
    end
  end

  def deliver_to_conversation!
    AccountConversation.add_status(@account, @status) unless update?
  end

  def anonymous_payload
    @anonymous_payload ||= Oj.dump(
      event: update? ? :'status.update' : :update,
      payload: InlineRenderer.render(@status, nil, :status)
    )
  end

  def update?
    @is_update
  end

  def broadcastable?
    @status.public_visibility? && !@account.silenced? && (!@status.reblog? || Setting.show_reblogs_in_public_timelines)
  end
end