Merge branch 'main' into glitch-soc/merge-upstream

2 files changed, 31 insertions, 11 deletions

diff --git a/app/services/activitypub/fetch_remote_status_service.rb b/app/services/activitypub/fetch_remote_status_service.rb
index 4f789d50b..9672b3d2b 100644
--- a/app/services/activitypub/fetch_remote_status_service.rb
+++ b/app/services/activitypub/fetch_remote_status_service.rb
@@ -15,24 +15,30 @@ class ActivityPub::FetchRemoteStatusService < BaseService
 
     return unless supported_context?
 
-    actor_id = nil
+    actor_uri     = nil
     activity_json = nil
+    object_uri    = nil
 
     if expected_object_type?
-      actor_id = value_or_id(first_of_value(@json['attributedTo']))
-      activity_json = { 'type' => 'Create', 'actor' => actor_id, 'object' => @json }
+      actor_uri     = value_or_id(first_of_value(@json['attributedTo']))
+      activity_json = { 'type' => 'Create', 'actor' => actor_uri, 'object' => @json }
+      object_uri    = uri_from_bearcap(@json['id'])
     elsif expected_activity_type?
-      actor_id = value_or_id(first_of_value(@json['actor']))
+      actor_uri     = value_or_id(first_of_value(@json['actor']))
       activity_json = @json
+      object_uri    = uri_from_bearcap(value_or_id(@json['object']))
     end
 
-    return if activity_json.nil? || !trustworthy_attribution?(@json['id'], actor_id)
+    return if activity_json.nil? || object_uri.nil? || !trustworthy_attribution?(@json['id'], actor_uri)
 
-    actor = ActivityPub::TagManager.instance.uri_to_resource(actor_id, Account)
-    actor = ActivityPub::FetchRemoteAccountService.new.call(actor_id, id: true) if actor.nil? || needs_update?(actor)
+    actor = account_from_uri(actor_uri)
 
     return if actor.nil? || actor.suspended?
 
+    # If we fetched a status that already exists, then we need to treat the
+    # activity as an update rather than create
+    activity_json['type'] = 'Update' if equals_or_includes_any?(activity_json['type'], %w(Create)) && Status.where(uri: object_uri, account_id: actor.id).exists?
+
     ActivityPub::Activity.factory(activity_json, actor).perform
   end
 
@@ -43,6 +49,12 @@ class ActivityPub::FetchRemoteStatusService < BaseService
     Addressable::URI.parse(uri).normalized_host.casecmp(Addressable::URI.parse(attributed_to).normalized_host).zero?
   end
 
+  def account_from_uri(uri)
+    actor = ActivityPub::TagManager.instance.uri_to_resource(uri, Account)
+    actor = ActivityPub::FetchRemoteAccountService.new.call(uri, id: true) if actor.nil? || actor.possibly_stale?
+    actor
+  end
+
   def supported_context?
     super(@json)
   end
@@ -54,8 +66,4 @@ class ActivityPub::FetchRemoteStatusService < BaseService
   def expected_object_type?
     equals_or_includes_any?(@json['type'], ActivityPub::Activity::Create::SUPPORTED_TYPES + ActivityPub::Activity::Create::CONVERTED_TYPES)
   end
-
-  def needs_update?(actor)
-    actor.possibly_stale?
-  end
 end
diff --git a/app/services/activitypub/process_status_update_service.rb b/app/services/activitypub/process_status_update_service.rb
index 1260c0482..70e9cb7d9 100644
--- a/app/services/activitypub/process_status_update_service.rb
+++ b/app/services/activitypub/process_status_update_service.rb
@@ -15,6 +15,8 @@ class ActivityPub::ProcessStatusUpdateService < BaseService
     # Only native types can be updated at the moment
     return if !expected_type? || already_updated_more_recently?
 
+    last_edit_date = status.edited_at.presence || status.created_at
+
     # Only allow processing one create/update per status at a time
     RedisLock.acquire(lock_options) do |lock|
       if lock.acquired?
@@ -37,6 +39,8 @@ class ActivityPub::ProcessStatusUpdateService < BaseService
         raise Mastodon::RaceConditionError
       end
     end
+
+    forward_activity! if significant_changes? && @status_parser.edited_at.present? && @status_parser.edited_at > last_edit_date
   end
 
   private
@@ -263,4 +267,12 @@ class ActivityPub::ProcessStatusUpdateService < BaseService
     PollExpirationNotifyWorker.remove_from_scheduled(poll.id) if @previous_expires_at.present? && @previous_expires_at > poll.expires_at
     PollExpirationNotifyWorker.perform_at(poll.expires_at + 5.minutes, poll.id)
   end
+
+  def forward_activity!
+    forwarder.forward! if forwarder.forwardable?
+  end
+
+  def forwarder
+    @forwarder ||= ActivityPub::Forwarder.new(@account, @json, @status)
+  end
 end