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Introduce StatusThreadingConcern (#3490) 

* Add a StatusFilter class to identify visibility of statuses by accounts

* Extract StatusThreadingConcern from Status

* Clarify purpose of checking for nil account
This commit is contained in:
Matt Jankowski 2017-06-05 10:07:44 -04:00 committed by Eugen Rochko
parent c26cea262b
commit 6201f96b8a
6 changed files with 311 additions and 124 deletions
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56
app/lib/status_filter.rb Normal file
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@ -0,0 +1,56 @@
# frozen_string_literal: true
class StatusFilter
attr_reader :status, :account
def initialize(status, account)
@status = status
@account = account
end
def filtered?
account_present? && filtered_status?
end
private
def account_present?
!account.nil?
end
def filtered_status?
blocking_account? || blocking_domain? || muting_account? || silenced_account? || blocked_by_policy?
end
def blocking_account?
account.blocking? status.account_id
end
def blocking_domain?
account.domain_blocking? status.account_domain
end
def muting_account?
account.muting? status.account_id
end
def silenced_account?
status_account_silenced? && !account_following_status_account?
end
def status_account_silenced?
status.account.silenced?
end
def account_following_status_account?
account.following? status.account_id
end
def blocked_by_policy?
!policy_allows_show?
end
def policy_allows_show?
StatusPolicy.new(account, status).show?
end
end

89
app/models/concerns/status_threading_concern.rb Normal file
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@ -0,0 +1,89 @@
# frozen_string_literal: true
module StatusThreadingConcern
extend ActiveSupport::Concern
def ancestors(account = nil)
find_statuses_from_tree_path(ancestor_ids, account)
end
def descendants(account = nil)
find_statuses_from_tree_path(descendant_ids, account)
end
private
def ancestor_ids
Rails.cache.fetch("ancestors:#{id}") do
ancestors_without_self.pluck(:id)
end
end
def ancestors_without_self
ancestor_statuses - [self]
end
def ancestor_statuses
Status.find_by_sql([<<-SQL.squish, id: id])
WITH RECURSIVE search_tree(id, in_reply_to_id, path)
AS (
SELECT id, in_reply_to_id, ARRAY[id]
FROM statuses
WHERE id = :id
UNION ALL
SELECT statuses.id, statuses.in_reply_to_id, path || statuses.id
FROM search_tree
JOIN statuses ON statuses.id = search_tree.in_reply_to_id
WHERE NOT statuses.id = ANY(path)
)
SELECT id
FROM search_tree
ORDER BY path DESC
SQL
end
def descendant_ids
descendants_without_self.pluck(:id)
end
def descendants_without_self
descendant_statuses - [self]
end
def descendant_statuses
Status.find_by_sql([<<-SQL.squish, id: id])
WITH RECURSIVE search_tree(id, path)
AS (
SELECT id, ARRAY[id]
FROM statuses
WHERE id = :id
UNION ALL
SELECT statuses.id, path || statuses.id
FROM search_tree
JOIN statuses ON statuses.in_reply_to_id = search_tree.id
WHERE NOT statuses.id = ANY(path)
)
SELECT id
FROM search_tree
ORDER BY path
SQL
end
def find_statuses_from_tree_path(ids, account)
statuses = statuses_with_accounts(ids).to_a
# FIXME: n+1 bonanza
statuses.reject! { |status| filter_from_context?(status, account) }
# Order ancestors/descendants by tree path
statuses.sort_by! { |status| ids.index(status.id) }
end
def statuses_with_accounts(ids)
Status.where(id: ids).includes(:account)
end
def filter_from_context?(status, account)
StatusFilter.new(status, account).filtered?
end
end

30
app/models/status.rb
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@ -28,6 +28,7 @@ class Status < ApplicationRecord
include Paginable
include Streamable
include Cacheable
include StatusThreadingConcern
enum visibility: [:public, :unlisted, :private, :direct], _suffix: :visibility
@ -115,16 +116,6 @@ class Status < ApplicationRecord
private_visibility? || direct_visibility?
end
def ancestors(account = nil)
ids = Rails.cache.fetch("ancestors:#{id}") { (Status.find_by_sql(['WITH RECURSIVE search_tree(id, in_reply_to_id, path) AS (SELECT id, in_reply_to_id, ARRAY[id] FROM statuses WHERE id = ? UNION ALL SELECT statuses.id, statuses.in_reply_to_id, path || statuses.id FROM search_tree JOIN statuses ON statuses.id = search_tree.in_reply_to_id WHERE NOT statuses.id = ANY(path)) SELECT id FROM search_tree ORDER BY path DESC', id]) - [self]).pluck(:id) }
find_statuses_from_tree_path(ids, account)
end
def descendants(account = nil)
ids = (Status.find_by_sql(['WITH RECURSIVE search_tree(id, path) AS (SELECT id, ARRAY[id] FROM statuses WHERE id = ? UNION ALL SELECT statuses.id, path || statuses.id FROM search_tree JOIN statuses ON statuses.in_reply_to_id = search_tree.id WHERE NOT statuses.id = ANY(path)) SELECT id FROM search_tree ORDER BY path', id]) - [self]).pluck(:id)
find_statuses_from_tree_path(ids, account)
end
def non_sensitive_with_media?
!sensitive? && media_attachments.any?
end
@ -277,23 +268,4 @@ class Status < ApplicationRecord
thread.account_id
end
end
def find_statuses_from_tree_path(ids, account)
statuses = Status.where(id: ids).includes(:account).to_a
# FIXME: n+1 bonanza
statuses.reject! { |status| filter_from_context?(status, account) }
# Order ancestors/descendants by tree path
statuses.sort_by! { |status| ids.index(status.id) }
end
def filter_from_context?(status, account)
should_filter = account&.blocking?(status.account_id)
should_filter ||= account&.domain_blocking?(status.account_domain)
should_filter ||= account&.muting?(status.account_id)
should_filter ||= (status.account.silenced? && !account&.following?(status.account_id))
should_filter ||= !StatusPolicy.new(account, status).show?
should_filter
end
end

65
spec/lib/status_filter_spec.rb Normal file
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@ -0,0 +1,65 @@
# frozen_string_literal: true
require 'rails_helper'
describe StatusFilter do
describe '#filtered?' do
let(:status) { Fabricate(:status) }
context 'without an account' do
subject { described_class.new(status, nil) }
it { is_expected.not_to be_filtered }
end
context 'with real account' do
let(:account) { Fabricate(:account) }
subject { described_class.new(status, account) }
context 'when there are no connections' do
it { is_expected.not_to be_filtered }
end
context 'when status account is blocked' do
before do
Fabricate(:block, account: account, target_account: status.account)
end
it { is_expected.to be_filtered }
end
context 'when status account domain is blocked' do
before do
status.account.update(domain: 'example.com')
Fabricate(:account_domain_block, account: account, domain: status.account_domain)
end
it { is_expected.to be_filtered }
end
context 'when status account is muted' do
before do
Fabricate(:mute, account: account, target_account: status.account)
end
it { is_expected.to be_filtered }
end
context 'when status account is silenced' do
before do
status.account.update(silenced: true)
end
it { is_expected.to be_filtered }
end
context 'when status policy does not allow show' do
before do
expect_any_instance_of(StatusPolicy).to receive(:show?).and_return(false)
end
it { is_expected.to be_filtered }
end
end
end
end

100
spec/models/concerns/status_threading_concern_spec.rb Normal file
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@ -0,0 +1,100 @@
# frozen_string_literal: true
require 'rails_helper'
describe StatusThreadingConcern do
describe '#ancestors' do
let!(:alice) { Fabricate(:account, username: 'alice') }
let!(:bob) { Fabricate(:account, username: 'bob', domain: 'example.com') }
let!(:jeff) { Fabricate(:account, username: 'jeff') }
let!(:status) { Fabricate(:status, account: alice) }
let!(:reply1) { Fabricate(:status, thread: status, account: jeff) }
let!(:reply2) { Fabricate(:status, thread: reply1, account: bob) }
let!(:reply3) { Fabricate(:status, thread: reply2, account: alice) }
let!(:viewer) { Fabricate(:account, username: 'viewer') }
it 'returns conversation history' do
expect(reply3.ancestors).to include(status, reply1, reply2)
end
it 'does not return conversation history user is not allowed to see' do
reply1.update(visibility: :private)
status.update(visibility: :direct)
expect(reply3.ancestors(viewer)).to_not include(reply1, status)
end
it 'does not return conversation history from blocked users' do
viewer.block!(jeff)
expect(reply3.ancestors(viewer)).to_not include(reply1)
end
it 'does not return conversation history from muted users' do
viewer.mute!(jeff)
expect(reply3.ancestors(viewer)).to_not include(reply1)
end
it 'does not return conversation history from silenced and not followed users' do
jeff.update(silenced: true)
expect(reply3.ancestors(viewer)).to_not include(reply1)
end
it 'does not return conversation history from blocked domains' do
viewer.block_domain!('example.com')
expect(reply3.ancestors(viewer)).to_not include(reply2)
end
it 'ignores deleted records' do
first_status = Fabricate(:status, account: bob)
second_status = Fabricate(:status, thread: first_status, account: alice)
# Create cache and delete cached record
second_status.ancestors
first_status.destroy
expect(second_status.ancestors).to eq([])
end
end
describe '#descendants' do
let!(:alice) { Fabricate(:account, username: 'alice') }
let!(:bob) { Fabricate(:account, username: 'bob', domain: 'example.com') }
let!(:jeff) { Fabricate(:account, username: 'jeff') }
let!(:status) { Fabricate(:status, account: alice) }
let!(:reply1) { Fabricate(:status, thread: status, account: alice) }
let!(:reply2) { Fabricate(:status, thread: status, account: bob) }
let!(:reply3) { Fabricate(:status, thread: reply1, account: jeff) }
let!(:viewer) { Fabricate(:account, username: 'viewer') }
it 'returns replies' do
expect(status.descendants).to include(reply1, reply2, reply3)
end
it 'does not return replies user is not allowed to see' do
reply1.update(visibility: :private)
reply3.update(visibility: :direct)
expect(status.descendants(viewer)).to_not include(reply1, reply3)
end
it 'does not return replies from blocked users' do
viewer.block!(jeff)
expect(status.descendants(viewer)).to_not include(reply3)
end
it 'does not return replies from muted users' do
viewer.mute!(jeff)
expect(status.descendants(viewer)).to_not include(reply3)
end
it 'does not return replies from silenced and not followed users' do
jeff.update(silenced: true)
expect(status.descendants(viewer)).to_not include(reply3)
end
it 'does not return replies from blocked domains' do
viewer.block_domain!('example.com')
expect(status.descendants(viewer)).to_not include(reply2)
end
end
end

95
spec/models/status_spec.rb
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@ -119,101 +119,6 @@ RSpec.describe Status, type: :model do
end
end
describe '#ancestors' do
let!(:alice) { Fabricate(:account, username: 'alice') }
let!(:bob) { Fabricate(:account, username: 'bob', domain: 'example.com') }
let!(:jeff) { Fabricate(:account, username: 'jeff') }
let!(:status) { Fabricate(:status, account: alice) }
let!(:reply1) { Fabricate(:status, thread: status, account: jeff) }
let!(:reply2) { Fabricate(:status, thread: reply1, account: bob) }
let!(:reply3) { Fabricate(:status, thread: reply2, account: alice) }
let!(:viewer) { Fabricate(:account, username: 'viewer') }
it 'returns conversation history' do
expect(reply3.ancestors).to include(status, reply1, reply2)
end
it 'does not return conversation history user is not allowed to see' do
reply1.update(visibility: :private)
status.update(visibility: :direct)
expect(reply3.ancestors(viewer)).to_not include(reply1, status)
end
it 'does not return conversation history from blocked users' do
viewer.block!(jeff)
expect(reply3.ancestors(viewer)).to_not include(reply1)
end
it 'does not return conversation history from muted users' do
viewer.mute!(jeff)
expect(reply3.ancestors(viewer)).to_not include(reply1)
end
it 'does not return conversation history from silenced and not followed users' do
jeff.update(silenced: true)
expect(reply3.ancestors(viewer)).to_not include(reply1)
end
it 'does not return conversation history from blocked domains' do
viewer.block_domain!('example.com')
expect(reply3.ancestors(viewer)).to_not include(reply2)
end
it 'ignores deleted records' do
first_status = Fabricate(:status, account: bob)
second_status = Fabricate(:status, thread: first_status, account: alice)
# Create cache and delete cached record
second_status.ancestors
first_status.destroy
expect(second_status.ancestors).to eq([])
end
end
describe '#descendants' do
let!(:alice) { Fabricate(:account, username: 'alice') }
let!(:bob) { Fabricate(:account, username: 'bob', domain: 'example.com') }
let!(:jeff) { Fabricate(:account, username: 'jeff') }
let!(:status) { Fabricate(:status, account: alice) }
let!(:reply1) { Fabricate(:status, thread: status, account: alice) }
let!(:reply2) { Fabricate(:status, thread: status, account: bob) }
let!(:reply3) { Fabricate(:status, thread: reply1, account: jeff) }
let!(:viewer) { Fabricate(:account, username: 'viewer') }
it 'returns replies' do
expect(status.descendants).to include(reply1, reply2, reply3)
end
it 'does not return replies user is not allowed to see' do
reply1.update(visibility: :private)
reply3.update(visibility: :direct)
expect(status.descendants(viewer)).to_not include(reply1, reply3)
end
it 'does not return replies from blocked users' do
viewer.block!(jeff)
expect(status.descendants(viewer)).to_not include(reply3)
end
it 'does not return replies from muted users' do
viewer.mute!(jeff)
expect(status.descendants(viewer)).to_not include(reply3)
end
it 'does not return replies from silenced and not followed users' do
jeff.update(silenced: true)
expect(status.descendants(viewer)).to_not include(reply3)
end
it 'does not return replies from blocked domains' do
viewer.block_domain!('example.com')
expect(status.descendants(viewer)).to_not include(reply2)
end
end
describe '.mutes_map' do
let(:status) { Fabricate(:status) }
let(:account) { Fabricate(:account) }