Add support for inlined objects in activity audience (#14514)

* Add support for inlined objects in activity audience

* Add tests

5 files changed, 62 insertions, 12 deletions

diff --git a/app/lib/activitypub/activity.rb b/app/lib/activitypub/activity.rb
index ab946470b9f..f0ef4d553d8 100644
--- a/app/lib/activitypub/activity.rb
+++ b/app/lib/activitypub/activity.rb
@@ -172,7 +172,7 @@ class ActivityPub::Activity
   end
 
   def first_mentioned_local_account
-    audience = (as_array(@json['to']) + as_array(@json['cc'])).uniq
+    audience = (as_array(@json['to']) + as_array(@json['cc'])).map { |x| value_or_id(x) }.uniq
     local_usernames = audience.select { |uri| ActivityPub::TagManager.instance.local_uri?(uri) }
                               .map { |uri| ActivityPub::TagManager.instance.uri_to_local_id(uri, :username) }
 
diff --git a/app/lib/activitypub/activity/announce.rb b/app/lib/activitypub/activity/announce.rb
index 9e108985a3e..349e8f77e71 100644
--- a/app/lib/activitypub/activity/announce.rb
+++ b/app/lib/activitypub/activity/announce.rb
@@ -34,12 +34,20 @@ class ActivityPub::Activity::Announce < ActivityPub::Activity
 
   private
 
+  def audience_to
+    as_array(@json['to']).map { |x| value_or_id(x) }
+  end
+
+  def audience_cc
+    as_array(@json['cc']).map { |x| value_or_id(x) }
+  end
+
   def visibility_from_audience
-    if equals_or_includes?(@json['to'], ActivityPub::TagManager::COLLECTIONS[:public])
+    if audience_to.include?(ActivityPub::TagManager::COLLECTIONS[:public])
       :public
-    elsif equals_or_includes?(@json['cc'], ActivityPub::TagManager::COLLECTIONS[:public])
+    elsif audience_cc.include?(ActivityPub::TagManager::COLLECTIONS[:public])
       :unlisted
-    elsif equals_or_includes?(@json['to'], @account.followers_url)
+    elsif audience_to.include?(@account.followers_url)
       :private
     else
       :direct
diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index 08dd98e942d..a60b79d159d 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -65,11 +65,11 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   end
 
   def audience_to
-    @object['to'] || @json['to']
+    as_array(@object['to'] || @json['to']).map { |x| value_or_id(x) }
   end
 
   def audience_cc
-    @object['cc'] || @json['cc']
+    as_array(@object['cc'] || @json['cc']).map { |x| value_or_id(x) }
   end
 
   def process_status
@@ -122,7 +122,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   end
 
   def process_audience
-    (as_array(audience_to) + as_array(audience_cc)).uniq.each do |audience|
+    (audience_to + audience_cc).uniq.each do |audience|
       next if audience == ActivityPub::TagManager::COLLECTIONS[:public]
 
       # Unlike with tags, there is no point in resolving accounts we don't already
@@ -352,11 +352,11 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   end
 
   def visibility_from_audience
-    if equals_or_includes?(audience_to, ActivityPub::TagManager::COLLECTIONS[:public])
+    if audience_to.include?(ActivityPub::TagManager::COLLECTIONS[:public])
       :public
-    elsif equals_or_includes?(audience_cc, ActivityPub::TagManager::COLLECTIONS[:public])
+    elsif audience_cc.include?(ActivityPub::TagManager::COLLECTIONS[:public])
       :unlisted
-    elsif equals_or_includes?(audience_to, @account.followers_url)
+    elsif audience_to.include?(@account.followers_url)
       :private
     else
       :direct
@@ -365,7 +365,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
 
   def audience_includes?(account)
     uri = ActivityPub::TagManager.instance.uri_for(account)
-    equals_or_includes?(audience_to, uri) || equals_or_includes?(audience_cc, uri)
+    audience_to.include?(uri) || audience_cc.include?(uri)
   end
 
   def replied_to_status
@@ -477,7 +477,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   def addresses_local_accounts?
     return true if @options[:delivered_to_account_id]
 
-    local_usernames = (as_array(audience_to) + as_array(audience_cc)).uniq.select { |uri| ActivityPub::TagManager.instance.local_uri?(uri) }.map { |uri| ActivityPub::TagManager.instance.uri_to_local_id(uri, :username) }
+    local_usernames = (audience_to + audience_cc).uniq.select { |uri| ActivityPub::TagManager.instance.local_uri?(uri) }.map { |uri| ActivityPub::TagManager.instance.uri_to_local_id(uri, :username) }
 
     return false if local_usernames.empty?
 
diff --git a/spec/lib/activitypub/activity/announce_spec.rb b/spec/lib/activitypub/activity/announce_spec.rb
index 60fd96a18ac..b93fcbe6656 100644
--- a/spec/lib/activitypub/activity/announce_spec.rb
+++ b/spec/lib/activitypub/activity/announce_spec.rb
@@ -73,6 +73,26 @@ RSpec.describe ActivityPub::Activity::Announce do
           expect(sender.reblogged?(sender.statuses.first)).to be true
         end
       end
+
+      context 'self-boost of a previously unknown status with correct attributedTo, inlined Collection in audience' do
+        let(:object_json) do
+          {
+            id: 'https://example.com/actor#bar',
+            type: 'Note',
+            content: 'Lorem ipsum',
+            attributedTo: 'https://example.com/actor',
+            to: {
+              'type': 'OrderedCollection',
+              'id': 'http://example.com/followers',
+              'first': 'http://example.com/followers?page=true',
+            }
+          }
+        end
+
+        it 'creates a reblog by sender of status' do
+          expect(sender.reblogged?(sender.statuses.first)).to be true
+        end
+      end
     end
 
     context 'when the status belongs to a local user' do
diff --git a/spec/lib/activitypub/activity/create_spec.rb b/spec/lib/activitypub/activity/create_spec.rb
index 51e0b8caff9..d2e9fe33ce4 100644
--- a/spec/lib/activitypub/activity/create_spec.rb
+++ b/spec/lib/activitypub/activity/create_spec.rb
@@ -121,6 +121,28 @@ RSpec.describe ActivityPub::Activity::Create do
         end
       end
 
+      context 'private with inlined Collection in audience' do
+        let(:object_json) do
+          {
+            id: [ActivityPub::TagManager.instance.uri_for(sender), '#bar'].join,
+            type: 'Note',
+            content: 'Lorem ipsum',
+            to: {
+              'type': 'OrderedCollection',
+              'id': 'http://example.com/followers',
+              'first': 'http://example.com/followers?page=true',
+            }
+          }
+        end
+
+        it 'creates status' do
+          status = sender.statuses.first
+
+          expect(status).to_not be_nil
+          expect(status.visibility).to eq 'private'
+        end
+      end
+
       context 'limited' do
         let(:recipient) { Fabricate(:account) }