Use likes and shares totalItems on status creations and updates (#32620)

app/lib/activitypub/activity/create.rb

@@ -53,6 +53,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     ApplicationRecord.transaction do
       @status = Status.create!(@params)
       attach_tags(@status)
+      attach_counts(@status)
     end
 
     resolve_thread(@status)
@@ -166,6 +167,18 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     end
   end
 
+  def attach_counts(status)
+    likes = @status_parser.favourites_count
+    shares = @status_parser.reblogs_count
+    return if likes.nil? && shares.nil?
+
+    status.status_stat.tap do |status_stat|
+      status_stat.untrusted_reblogs_count = shares unless shares.nil?
+      status_stat.untrusted_favourites_count = likes unless likes.nil?
+      status_stat.save if status_stat.changed?
+    end
+  end
+
   def process_tags
     return if @object['tag'].nil?
 

app/lib/activitypub/parser/status_parser.rb

@@ -93,6 +93,14 @@ class ActivityPub::Parser::StatusParser
     lang.presence && NORMALIZED_LOCALE_NAMES.fetch(lang.downcase.to_sym, lang)
   end
 
+  def favourites_count
+    @object.dig(:likes, :totalItems)
+  end
+
+  def reblogs_count
+    @object.dig(:shares, :totalItems)
+  end
+
   private
 
   def raw_language_code

app/models/status.rb

@@ -303,13 +303,35 @@ class Status < ApplicationRecord
     status_stat&.favourites_count || 0
   end
 
+  # Reblogs count received from an external instance
+  def untrusted_reblogs_count
+    status_stat&.untrusted_reblogs_count unless local?
+  end
+
+  # Favourites count received from an external instance
+  def untrusted_favourites_count
+    status_stat&.untrusted_favourites_count unless local?
+  end
+
   def increment_count!(key)
+    if key == :favourites_count && !untrusted_favourites_count.nil?
+      update_status_stat!(favourites_count: favourites_count + 1, untrusted_favourites_count: untrusted_favourites_count + 1)
+    elsif key == :reblogs_count && !untrusted_reblogs_count.nil?
+      update_status_stat!(reblogs_count: reblogs_count + 1, untrusted_reblogs_count: untrusted_reblogs_count + 1)
+    else
       update_status_stat!(key => public_send(key) + 1)
     end
+  end
 
   def decrement_count!(key)
+    if key == :favourites_count && !untrusted_favourites_count.nil?
+      update_status_stat!(favourites_count: [favourites_count - 1, 0].max, untrusted_favourites_count: [untrusted_favourites_count - 1, 0].max)
+    elsif key == :reblogs_count && !untrusted_reblogs_count.nil?
+      update_status_stat!(reblogs_count: [reblogs_count - 1, 0].max, untrusted_reblogs_count: [untrusted_reblogs_count - 1, 0].max)
+    else
       update_status_stat!(key => [public_send(key) - 1, 0].max)
     end
+  end
 
   def trendable?
     if attributes['trendable'].nil?

app/models/status_stat.rb

@@ -11,11 +11,17 @@
 #  favourites_count           :bigint(8)        default(0), not null
 #  created_at                 :datetime         not null
 #  updated_at                 :datetime         not null
+#  untrusted_favourites_count :bigint(8)
+#  untrusted_reblogs_count    :bigint(8)
 #
 
 class StatusStat < ApplicationRecord
   belongs_to :status, inverse_of: :status_stat
 
+  before_validation :clamp_untrusted_counts
+
+  MAX_UNTRUSTED_COUNT = 100_000_000
+
   def replies_count
     [attributes['replies_count'], 0].max
   end
@@ -27,4 +33,11 @@ class StatusStat < ApplicationRecord
   def favourites_count
     [attributes['favourites_count'], 0].max
   end
+
+  private
+
+  def clamp_untrusted_counts
+    self.untrusted_favourites_count = untrusted_favourites_count.to_i.clamp(0, MAX_UNTRUSTED_COUNT) if untrusted_favourites_count.present?
+    self.untrusted_reblogs_count = untrusted_reblogs_count.to_i.clamp(0, MAX_UNTRUSTED_COUNT) if untrusted_reblogs_count.present?
+  end
 end

app/serializers/rest/status_serializer.rb

@@ -84,11 +84,11 @@ class REST::StatusSerializer < ActiveModel::Serializer
   end
 
   def reblogs_count
-    relationships&.attributes_map&.dig(object.id, :reblogs_count) || object.reblogs_count
+    object.untrusted_reblogs_count || relationships&.attributes_map&.dig(object.id, :reblogs_count) || object.reblogs_count
   end
 
   def favourites_count
-    relationships&.attributes_map&.dig(object.id, :favourites_count) || object.favourites_count
+    object.untrusted_favourites_count || relationships&.attributes_map&.dig(object.id, :favourites_count) || object.favourites_count
   end
 
   def favourited

app/services/activitypub/process_status_update_service.rb

@@ -43,6 +43,7 @@ class ActivityPub::ProcessStatusUpdateService < BaseService
         update_poll!
         update_immediate_attributes!
         update_metadata!
+        update_counts!
         create_edits!
       end
 
@@ -62,6 +63,7 @@ class ActivityPub::ProcessStatusUpdateService < BaseService
     with_redis_lock("create:#{@uri}") do
       update_poll!(allow_significant_changes: false)
       queue_poll_notifications!
+      update_counts!
     end
   end
 
@@ -239,6 +241,19 @@ class ActivityPub::ProcessStatusUpdateService < BaseService
     end
   end
 
+  def update_counts!
+    likes = @status_parser.favourites_count
+    shares =  @status_parser.reblogs_count
+    return if likes.nil? && shares.nil?
+
+    @status.status_stat.tap do |status_stat|
+      status_stat.untrusted_reblogs_count = shares unless shares.nil?
+      status_stat.untrusted_favourites_count = likes unless likes.nil?
+
+      status_stat.save if status_stat.changed?
+    end
+  end
+
   def expected_type?
     equals_or_includes_any?(@json['type'], %w(Note Question))
   end

db/migrate/20241022214312_add_untrusted_favourites_count_and_untrusted_reblogs_count_to_status_stat.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+class AddUntrustedFavouritesCountAndUntrustedReblogsCountToStatusStat < ActiveRecord::Migration[7.1]
+  def change
+    add_column :status_stats, :untrusted_favourites_count, :bigint, null: true
+    add_column :status_stats, :untrusted_reblogs_count, :bigint, null: true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2024_10_14_010506) do
+ActiveRecord::Schema[7.1].define(version: 2024_10_22_214312) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -1008,6 +1008,8 @@ ActiveRecord::Schema[7.1].define(version: 2024_10_14_010506) do
     t.bigint "favourites_count", default: 0, null: false
     t.datetime "created_at", precision: nil, null: false
     t.datetime "updated_at", precision: nil, null: false
+    t.bigint "untrusted_favourites_count"
+    t.bigint "untrusted_reblogs_count"
     t.index ["status_id"], name: "index_status_stats_on_status_id", unique: true
   end
 

spec/lib/activitypub/activity/create_spec.rb

@@ -928,6 +928,32 @@ RSpec.describe ActivityPub::Activity::Create do
           expect(poll.votes.first).to be_nil
         end
       end
+
+      context 'with counts' do
+        let(:object_json) do
+          {
+            id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
+            type: 'Note',
+            content: 'Lorem ipsum',
+            likes: {
+              id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar', '/likes'].join,
+              type: 'Collection',
+              totalItems: 50,
+            },
+            shares: {
+              id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar', '/shares'].join,
+              type: 'Collection',
+              totalItems: 100,
+            },
+          }
+        end
+
+        it 'uses the counts from the created object' do
+          status = sender.statuses.first
+          expect(status.untrusted_favourites_count).to eq 50
+          expect(status.untrusted_reblogs_count).to eq 100
+        end
+      end
     end
 
     context 'when object URI uses bearcaps' do

spec/lib/activitypub/activity/update_spec.rb

@@ -115,5 +115,69 @@ RSpec.describe ActivityPub::Activity::Update do
         expect(status.edited_at).to be_nil
       end
     end
+
+    context 'with a Note object' do
+      let(:updated) { nil }
+      let(:favourites) { 50 }
+      let(:reblogs) { 100 }
+
+      let!(:status) { Fabricate(:status, uri: 'https://example.com/statuses/poll', account: sender) }
+      let(:json) do
+        {
+          '@context': 'https://www.w3.org/ns/activitystreams',
+          id: 'foo',
+          type: 'Update',
+          actor: sender.uri,
+          object: {
+            type: 'Note',
+            id: status.uri,
+            content: 'Foo',
+            updated: updated,
+            likes: {
+              id: "#{status.uri}/likes",
+              type: 'Collection',
+              totalItems: favourites,
+            },
+            shares: {
+              id: "#{status.uri}/shares",
+              type: 'Collection',
+              totalItems: reblogs,
+            },
+          },
+        }.with_indifferent_access
+      end
+
+      shared_examples 'updates counts' do
+        it 'updates the reblog count' do
+          expect(status.untrusted_reblogs_count).to eq reblogs
+        end
+
+        it 'updates the favourites count' do
+          expect(status.untrusted_favourites_count).to eq favourites
+        end
+      end
+
+      context 'with an implicit update' do
+        before do
+          status.update!(uri: ActivityPub::TagManager.instance.uri_for(status))
+          subject.perform
+        end
+
+        it_behaves_like 'updates counts'
+      end
+
+      context 'with an explicit update' do
+        let(:favourites) { 150 }
+        let(:reblogs) { 200 }
+        let(:updated) { Time.now.utc.iso8601 }
+
+        before do
+          status.update!(uri: ActivityPub::TagManager.instance.uri_for(status))
+          subject.perform
+        end
+
+        it_behaves_like 'updates counts'
+      end
+    end
   end
 end

spec/models/status_spec.rb

@@ -164,6 +164,31 @@ RSpec.describe Status do
     end
   end
 
+  describe '#untrusted_reblogs_count' do
+    before do
+      alice.update(domain: 'example.com')
+      subject.status_stat.tap do |status_stat|
+        status_stat.untrusted_reblogs_count = 0
+        status_stat.save
+      end
+      subject.save
+    end
+
+    it 'is incremented by the number of reblogs' do
+      Fabricate(:status, account: bob, reblog: subject)
+      Fabricate(:status, account: alice, reblog: subject)
+
+      expect(subject.untrusted_reblogs_count).to eq 2
+    end
+
+    it 'is decremented when reblog is removed' do
+      reblog = Fabricate(:status, account: bob, reblog: subject)
+      expect(subject.untrusted_reblogs_count).to eq 1
+      reblog.destroy
+      expect(subject.untrusted_reblogs_count).to eq 0
+    end
+  end
+
   describe '#replies_count' do
     it 'is the number of replies' do
       Fabricate(:status, account: bob, thread: subject)
@@ -194,6 +219,31 @@ RSpec.describe Status do
     end
   end
 
+  describe '#untrusted_favourites_count' do
+    before do
+      alice.update(domain: 'example.com')
+      subject.status_stat.tap do |status_stat|
+        status_stat.untrusted_favourites_count = 0
+        status_stat.save
+      end
+      subject.save
+    end
+
+    it 'is incremented by favorites' do
+      Fabricate(:favourite, account: bob, status: subject)
+      Fabricate(:favourite, account: alice, status: subject)
+
+      expect(subject.untrusted_favourites_count).to eq 2
+    end
+
+    it 'is decremented when favourite is removed' do
+      favourite = Fabricate(:favourite, account: bob, status: subject)
+      expect(subject.untrusted_favourites_count).to eq 1
+      favourite.destroy
+      expect(subject.untrusted_favourites_count).to eq 0
+    end
+  end
+
   describe '#proper' do
     it 'is itself for original statuses' do
       expect(subject.proper).to eq subject

spec/requests/api/v1/trends/statuses_spec.rb

@@ -39,6 +39,42 @@ RSpec.describe 'API V1 Trends Statuses' do
         end
         Trends::Statuses.new(threshold: 1, decay_threshold: -1).refresh
       end
+
+      context 'with a comically inflated external interactions count' do
+        def prepare_fake_trends
+          fake_remote_account = Fabricate(:account, domain: 'other.com')
+          fake_status = Fabricate(:status, account: fake_remote_account, text: 'I am a big faker', trendable: true, language: 'en')
+          fake_status.status_stat.tap do |status_stat|
+            status_stat.reblogs_count = 0
+            status_stat.favourites_count = 0
+            status_stat.untrusted_reblogs_count = 1_000_000_000
+            status_stat.untrusted_favourites_count = 1_000_000_000
+            status_stat.save
+          end
+          real_remote_account = Fabricate(:account, domain: 'other.com')
+          real_status = Fabricate(:status, account: real_remote_account, text: 'I make real friends online', trendable: true, language: 'en')
+          real_status.status_stat.tap do |status_stat|
+            status_stat.reblogs_count = 10
+            status_stat.favourites_count = 10
+            status_stat.untrusted_reblogs_count = 10
+            status_stat.untrusted_favourites_count = 10
+            status_stat.save
+          end
+          Trends.statuses.add(fake_status, 100)
+          Trends.statuses.add(real_status, 101)
+          Trends::Statuses.new(threshold: 1, decay_threshold: 1).refresh
+        end
+
+        it 'ignores the feeble attempts at deception' do
+          prepare_fake_trends
+          stub_const('Api::BaseController::DEFAULT_STATUSES_LIMIT', 10)
+          get '/api/v1/trends/statuses'
+
+          expect(response).to have_http_status(200)
+          expect(response.parsed_body.length).to eq(1)
+          expect(response.parsed_body[0]['content']).to eq('I make real friends online')
+        end
+      end
     end
   end
 end

spec/serializers/rest/status_serializer_spec.rb

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe REST::StatusSerializer do
+  subject do
+    serialized_record_json(
+      status,
+      described_class,
+      options: {
+        scope: current_user,
+        scope_name: :current_user,
+      }
+    )
+  end
+
+  let(:current_user) { Fabricate(:user) }
+  let(:alice) { Fabricate(:account, username: 'alice') }
+  let(:bob)   { Fabricate(:account, username: 'bob', domain: 'other.com') }
+  let(:status) { Fabricate(:status, account: alice) }
+
+  context 'with a remote status' do
+    let(:status) { Fabricate(:status, account: bob) }
+
+    before do
+      status.status_stat.tap do |status_stat|
+        status_stat.reblogs_count = 10
+        status_stat.favourites_count = 20
+        status_stat.save
+      end
+    end
+
+    context 'with only trusted counts' do
+      it 'shows the trusted counts' do
+        expect(subject['reblogs_count']).to eq(10)
+        expect(subject['favourites_count']).to eq(20)
+      end
+    end
+
+    context 'with untrusted counts' do
+      before do
+        status.status_stat.tap do |status_stat|
+          status_stat.untrusted_reblogs_count = 30
+          status_stat.untrusted_favourites_count = 40
+          status_stat.save
+        end
+      end
+
+      it 'shows the untrusted counts' do
+        expect(subject['reblogs_count']).to eq(30)
+        expect(subject['favourites_count']).to eq(40)
+      end
+    end
+  end
+end

spec/spec_helper.rb

@@ -34,8 +34,8 @@ RSpec.configure do |config|
   end
 end
 
-def serialized_record_json(record, serializer, adapter: nil)
-  options = { serializer: serializer }
+def serialized_record_json(record, serializer, adapter: nil, options: {})
+  options[:serializer] = serializer
   options[:adapter] = adapter if adapter.present?
   JSON.parse(
     ActiveModelSerializers::SerializableResource.new(