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Fix follow suggestions potentially including silenced or blocked accounts (#29306)

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Claire 2024-03-04 07:35:20 +01:00 committed by GitHub
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5 changed files with 107 additions and 34 deletions
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34
app/models/account_suggestions/friends_of_friends_source.rb
View file

@ -2,31 +2,15 @@
class AccountSuggestions::FriendsOfFriendsSource < AccountSuggestions::Source
def get(account, limit: DEFAULT_LIMIT)
Account.find_by_sql([<<~SQL.squish, { id: account.id, limit: limit }]).map { |row| [row.id, key] }
WITH first_degree AS (
SELECT target_account_id
FROM follows
JOIN accounts AS target_accounts ON follows.target_account_id = target_accounts.id
WHERE account_id = :id
AND NOT target_accounts.hide_collections
)
SELECT accounts.id, COUNT(*) AS frequency
FROM accounts
JOIN follows ON follows.target_account_id = accounts.id
JOIN account_stats ON account_stats.account_id = accounts.id
LEFT OUTER JOIN follow_recommendation_mutes ON follow_recommendation_mutes.target_account_id = accounts.id AND follow_recommendation_mutes.account_id = :id
WHERE follows.account_id IN (SELECT * FROM first_degree)
AND NOT EXISTS (SELECT 1 FROM follows f WHERE f.target_account_id = follows.target_account_id AND f.account_id = :id)
AND follows.target_account_id <> :id
AND accounts.discoverable
AND accounts.suspended_at IS NULL
AND accounts.silenced_at IS NULL
AND accounts.moved_to_account_id IS NULL
AND follow_recommendation_mutes.target_account_id IS NULL
GROUP BY accounts.id, account_stats.id
ORDER BY frequency DESC, account_stats.followers_count ASC
LIMIT :limit
SQL
first_degree = account.following.where.not(hide_collections: true).select(:id).reorder(nil)
base_account_scope(account)
.joins(:account_stat)
.where(id: Follow.where(account_id: first_degree).select(:target_account_id))
.group('accounts.id, account_stats.id')
.reorder('frequency DESC, followers_count DESC')
.limit(limit)
.pluck(Arel.sql('accounts.id, COUNT(*) AS frequency'))
.map { |id, _frequency| [id, key] }
end
private

3
app/models/account_suggestions/similar_profiles_source.rb
View file

@ -51,7 +51,8 @@ class AccountSuggestions::SimilarProfilesSource < AccountSuggestions::Source
recently_followed_account_ids = account.active_relationships.recent.limit(5).pluck(:target_account_id)
if Chewy.enabled? && !recently_followed_account_ids.empty?
QueryBuilder.new(recently_followed_account_ids, account).build.limit(limit).hits.pluck('_id').map(&:to_i).zip([key].cycle)
ids_from_es = QueryBuilder.new(recently_followed_account_ids, account).build.limit(limit).hits.pluck('_id').map(&:to_i)
base_account_scope(account).where(id: ids_from_es).pluck(:id).zip([key].cycle)
else
[]
end

2
app/models/account_suggestions/source.rb
View file

@ -12,6 +12,8 @@ class AccountSuggestions::Source
def base_account_scope(account)
Account
.searchable
.where(discoverable: true)
.without_silenced
.where.not(follows_sql, id: account.id)
.where.not(follow_requests_sql, id: account.id)
.not_excluded_by_account(account)

82
spec/models/account_suggestions/friends_of_friends_source_spec.rb Normal file
View file

@ -0,0 +1,82 @@
# frozen_string_literal: true
require 'rails_helper'
RSpec.describe AccountSuggestions::FriendsOfFriendsSource do
describe '#get' do
subject { described_class.new }
let!(:bob) { Fabricate(:account, discoverable: true, hide_collections: false) }
let!(:alice) { Fabricate(:account, discoverable: true, hide_collections: true) }
let!(:eve) { Fabricate(:account, discoverable: true, hide_collections: false) }
let!(:mallory) { Fabricate(:account, discoverable: false, hide_collections: false) }
let!(:eugen) { Fabricate(:account, discoverable: true, hide_collections: false) }
let!(:john) { Fabricate(:account, discoverable: true, hide_collections: false) }
let!(:jerk) { Fabricate(:account, discoverable: true, hide_collections: false) }
let!(:neil) { Fabricate(:account, discoverable: true, hide_collections: false) }
let!(:larry) { Fabricate(:account, discoverable: true, hide_collections: false) }
context 'with follows and blocks' do
before do
bob.block!(jerk)
FollowRecommendationMute.create!(account: bob, target_account: neil)
# bob follows eugen, alice and larry
[eugen, alice, larry].each { |account| bob.follow!(account) }
# alice follows eve and mallory
[john, mallory].each { |account| alice.follow!(account) }
# eugen follows eve, john, jerk, larry and neil
[eve, mallory, jerk, larry, neil].each { |account| eugen.follow!(account) }
end
it 'returns eligible accounts', :aggregate_failures do
results = subject.get(bob)
# eve is returned through eugen
expect(results).to include([eve.id, :friends_of_friends])
# john is not reachable because alice hides who she follows
expect(results).to_not include([john.id, :friends_of_friends])
# mallory is not discoverable
expect(results).to_not include([mallory.id, :friends_of_friends])
# larry is not included because he's followed already
expect(results).to_not include([larry.id, :friends_of_friends])
# jerk is blocked
expect(results).to_not include([jerk.id, :friends_of_friends])
# the suggestion for neil has already been rejected
expect(results).to_not include([neil.id, :friends_of_friends])
end
end
context 'with deterministic order' do
before do
# bob follows eve and mallory
[eve, mallory].each { |account| bob.follow!(account) }
# eve follows eugen, john, and jerk
[jerk, eugen, john].each { |account| eve.follow!(account) }
# mallory follows eugen, john, and neil
[neil, eugen, john].each { |account| mallory.follow!(account) }
john.follow!(eugen)
john.follow!(neil)
end
it 'returns eligible accounts in the expected order' do
expect(subject.get(bob)).to eq [
[eugen.id, :friends_of_friends], # followed by 2 friends, 3 followers total
[john.id, :friends_of_friends], # followed by 2 friends, 2 followers total
[neil.id, :friends_of_friends], # followed by 1 friend, 2 followers total
[jerk.id, :friends_of_friends], # followed by 1 friend, 1 follower total
]
end
end
end
end

20
spec/models/account_suggestions/source_spec.rb
View file

@ -11,14 +11,16 @@ RSpec.describe AccountSuggestions::Source do
end
context 'with follows and follow requests' do
let!(:account_domain_blocked_account) { Fabricate(:account, domain: 'blocked.host') }
let!(:account) { Fabricate(:account) }
let!(:blocked_account) { Fabricate(:account) }
let!(:eligible_account) { Fabricate(:account) }
let!(:follow_recommendation_muted_account) { Fabricate(:account) }
let!(:follow_requested_account) { Fabricate(:account) }
let!(:following_account) { Fabricate(:account) }
let!(:moved_account) { Fabricate(:account, moved_to_account: Fabricate(:account)) }
let!(:account_domain_blocked_account) { Fabricate(:account, domain: 'blocked.host', discoverable: true) }
let!(:account) { Fabricate(:account, discoverable: true) }
let!(:blocked_account) { Fabricate(:account, discoverable: true) }
let!(:eligible_account) { Fabricate(:account, discoverable: true) }
let!(:follow_recommendation_muted_account) { Fabricate(:account, discoverable: true) }
let!(:follow_requested_account) { Fabricate(:account, discoverable: true) }
let!(:following_account) { Fabricate(:account, discoverable: true) }
let!(:moved_account) { Fabricate(:account, moved_to_account: Fabricate(:account), discoverable: true) }
let!(:silenced_account) { Fabricate(:account, silenced: true, discoverable: true) }
let!(:undiscoverable_account) { Fabricate(:account, discoverable: false) }
before do
Fabricate :account_domain_block, account: account, domain: account_domain_blocked_account.domain
@ -40,6 +42,8 @@ RSpec.describe AccountSuggestions::Source do
.and not_include(follow_requested_account)
.and not_include(following_account)
.and not_include(moved_account)
.and not_include(silenced_account)
.and not_include(undiscoverable_account)
end
end
end