Clean up OStatus-related codepaths (#12173)

* Remove “protocol” argument and return value, as only ActivityPub is supported

* Remove FetchRemoteAccountService, only use ActivityPub::FetchRemoteAccountService

* Fix tests

app/lib/activitypub/activity/create.rb

@@ -167,7 +167,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     return if tag['href'].blank?
 
     account = account_from_uri(tag['href'])
-    account = ::FetchRemoteAccountService.new.call(tag['href']) if account.nil?
+    account = ActivityPub::FetchRemoteAccountService.new.call(tag['href']) if account.nil?
 
     return if account.nil?
 

app/services/fetch_remote_account_service.rb

-# frozen_string_literal: true
-
-class FetchRemoteAccountService < BaseService
-  def call(url, prefetched_body = nil, protocol = :ostatus)
-    if prefetched_body.nil?
-      resource_url, resource_options, protocol = FetchResourceService.new.call(url)
-    else
-      resource_url     = url
-      resource_options = { prefetched_body: prefetched_body }
-    end
-
-    case protocol
-    when :activitypub
-      ActivityPub::FetchRemoteAccountService.new.call(resource_url, **resource_options)
-    end
-  end
-end

app/services/fetch_remote_status_service.rb

 # frozen_string_literal: true
 
 class FetchRemoteStatusService < BaseService
-  def call(url, prefetched_body = nil, protocol = :ostatus)
+  def call(url, prefetched_body = nil)
     if prefetched_body.nil?
-      resource_url, resource_options, protocol = FetchResourceService.new.call(url)
+      resource_url, resource_options = FetchResourceService.new.call(url)
     else
       resource_url     = url
       resource_options = { prefetched_body: prefetched_body }
     end
 
-    case protocol
-    when :activitypub
-      ActivityPub::FetchRemoteStatusService.new.call(resource_url, **resource_options)
-    end
+    ActivityPub::FetchRemoteStatusService.new.call(resource_url, **resource_options)
   end
 end

app/services/fetch_resource_service.rb

@@ -33,7 +33,7 @@ class FetchResourceService < BaseService
       body = response.body_with_limit
       json = body_to_json(body)
 
-      [json['id'], { prefetched_body: body, id: true }, :activitypub] if supported_context?(json) && (equals_or_includes_any?(json['type'], ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES) || expected_type?(json))
+      [json['id'], { prefetched_body: body, id: true }] if supported_context?(json) && (equals_or_includes_any?(json['type'], ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES) || expected_type?(json))
     elsif !terminal
       link_header = response['Link'] && parse_link_header(response)
 

app/services/resolve_url_service.rb

@@ -19,9 +19,9 @@ class ResolveURLService < BaseService
 
   def process_url
     if equals_or_includes_any?(type, ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES)
-      FetchRemoteAccountService.new.call(resource_url, body, protocol)
+      ActivityPub::FetchRemoteAccountService.new.call(resource_url, prefetched_body: body)
     elsif equals_or_includes_any?(type, ActivityPub::Activity::Create::SUPPORTED_TYPES + ActivityPub::Activity::Create::CONVERTED_TYPES)
-      status = FetchRemoteStatusService.new.call(resource_url, body, protocol)
+      status = FetchRemoteStatusService.new.call(resource_url, body)
       authorize_with @on_behalf_of, status, :show? unless status.nil?
       status
     elsif fetched_resource.nil? && @on_behalf_of.present?
@@ -45,12 +45,8 @@ class ResolveURLService < BaseService
     fetched_resource.second[:prefetched_body]
   end
 
-  def protocol
-    fetched_resource.third
-  end
-
   def type
-    return json_data['type'] if protocol == :activitypub
+    json_data['type']
   end
 
   def json_data

spec/services/fetch_remote_account_service_spec.rb

-require 'rails_helper'
-
-RSpec.describe FetchRemoteAccountService, type: :service do
-  let(:url) { 'https://example.com/alice' }
-  let(:prefetched_body) { nil }
-  let(:protocol) { :ostatus }
-
-  subject { FetchRemoteAccountService.new.call(url, prefetched_body, protocol) }
-
-  let(:actor) do
-    {
-      '@context': 'https://www.w3.org/ns/activitystreams',
-      id: 'https://example.com/alice',
-      type: 'Person',
-      preferredUsername: 'alice',
-      name: 'Alice',
-      summary: 'Foo bar',
-      inbox: 'http://example.com/alice/inbox',
-    }
-  end
-
-  let(:webfinger) { { subject: 'acct:alice@example.com', links: [{ rel: 'self', href: 'https://example.com/alice' }] } }
-  let(:xml) { File.read(Rails.root.join('spec', 'fixtures', 'xml', 'mastodon.atom')) }
-
-  shared_examples 'return Account' do
-    it { is_expected.to be_an Account }
-  end
-
-  context 'protocol is :activitypub' do
-    let(:prefetched_body) { Oj.dump(actor) }
-    let(:protocol) { :activitypub }
-
-    before do
-      stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
-    end
-
-    include_examples 'return Account'
-  end
-
-  context 'when prefetched_body is nil' do
-    context 'protocol is :activitypub' do
-      before do
-        stub_request(:get, url).to_return(status: 200, body: Oj.dump(actor), headers: { 'Content-Type' => 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
-      end
-
-      include_examples 'return Account'
-    end
-  end
-end

spec/services/fetch_remote_status_service_spec.rb

@@ -16,9 +16,8 @@ RSpec.describe FetchRemoteStatusService, type: :service do
   end
 
   context 'protocol is :activitypub' do
-    subject { described_class.new.call(note[:id], prefetched_body, protocol) }
+    subject { described_class.new.call(note[:id], prefetched_body) }
     let(:prefetched_body) { Oj.dump(note) }
-    let(:protocol) { :activitypub }
 
     before do
       account.update(uri: ActivityPub::TagManager.instance.uri_for(account))
@@ -59,7 +58,7 @@ RSpec.describe FetchRemoteStatusService, type: :service do
         </entry>
       XML
 
-      expect(subject.call('https://fake.domain/foo', status_body, :ostatus)).to be_nil
+      expect(subject.call('https://fake.domain/foo', status_body)).to be_nil
     end
 
     it 'does not create status with wrong id when id uses http format' do
@@ -81,7 +80,7 @@ RSpec.describe FetchRemoteStatusService, type: :service do
         </entry>
       XML
 
-      expect(subject.call('https://real.domain/statuses/456', status_body, :ostatus)).to be_nil
+      expect(subject.call('https://real.domain/statuses/456', status_body)).to be_nil
     end
   end
 end

spec/services/fetch_resource_service_spec.rb

@@ -71,14 +71,14 @@ RSpec.describe FetchResourceService, type: :service do
         let(:content_type) { 'application/activity+json; charset=utf-8' }
         let(:body) { json }
 
-        it { is_expected.to eq [1, { prefetched_body: body, id: true }, :activitypub] }
+        it { is_expected.to eq [1, { prefetched_body: body, id: true }] }
       end
 
       context 'when content type is ld+json with profile' do
         let(:content_type) { 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"' }
         let(:body) { json }
 
-        it { is_expected.to eq [1, { prefetched_body: body, id: true }, :activitypub] }
+        it { is_expected.to eq [1, { prefetched_body: body, id: true }] }
       end
 
       before do
@@ -89,14 +89,14 @@ RSpec.describe FetchResourceService, type: :service do
       context 'when link header is present' do
         let(:headers) { { 'Link' => '<http://example.com/foo>; rel="alternate"; type="application/activity+json"', } }
 
-        it { is_expected.to eq [1, { prefetched_body: json, id: true }, :activitypub] }
+        it { is_expected.to eq [1, { prefetched_body: json, id: true }] }
       end
 
       context 'when content type is text/html' do
         let(:content_type) { 'text/html' }
         let(:body) { '<html><head><link rel="alternate" href="http://example.com/foo" type="application/activity+json"/></head></html>' }
 
-        it { is_expected.to eq [1, { prefetched_body: json, id: true }, :activitypub] }
+        it { is_expected.to eq [1, { prefetched_body: json, id: true }] }
       end
     end
   end