Update hub URL and re-subscribe if hub URL changes

app/services/follow_remote_account_service.rb

@@ -80,8 +80,7 @@ class FollowRemoteAccountService < BaseService
   end
 
   def get_profile(xml, account)
-    author = xml.at_xpath('/xmlns:feed/xmlns:author') || xml.at_xpath('/xmlns:feed').at_xpath('./dfrn:owner', dfrn: DFRN_NS)
-    update_remote_profile_service.call(author, account)
+    update_remote_profile_service.call(xml.at_xpath('/xmlns:feed'), account)
   end
 
   def update_remote_profile_service

app/services/process_feed_service.rb

@@ -16,7 +16,7 @@ class ProcessFeedService < BaseService
 
   def update_author(xml, account)
     return if xml.at_xpath('/xmlns:feed').nil?
-    UpdateRemoteProfileService.new.call(xml.at_xpath('/xmlns:feed/xmlns:author'), account)
+    UpdateRemoteProfileService.new.call(xml.at_xpath('/xmlns:feed'), account, true)
   end
 
   def process_entries(xml, account)

app/services/process_interaction_service.rb

@@ -26,7 +26,7 @@ class ProcessInteractionService < BaseService
     end
 
     if salmon.verify(envelope, account.keypair)
-      update_remote_profile_service.call(xml.at_xpath('/xmlns:entry/xmlns:author'), account)
+      update_remote_profile_service.call(xml.at_xpath('/xmlns:entry'), account, true)
 
       case verb(xml)
       when :follow

app/services/update_remote_profile_service.rb

@@ -2,24 +2,22 @@
 
 class UpdateRemoteProfileService < BaseService
   POCO_NS = 'http://portablecontacts.net/spec/1.0'
+  DFRN_NS = 'http://purl.org/macgirvin/dfrn/1.0'
 
-  def call(author_xml, account)
-    return if author_xml.nil?
+  def call(xml, account, resubscribe = false)
+    author_xml = xml.at_xpath('./xmlns:author') || xml.at_xpath('./dfrn:owner', dfrn: DFRN_NS)
+    hub_link   = xml.at_xpath('./xmlns:link[@rel="hub"]')
 
-    account.display_name = if author_xml.at_xpath('./poco:displayName', poco: POCO_NS).nil?
-                             account.username
-                           else
-                             author_xml.at_xpath('./poco:displayName', poco: POCO_NS).content
-                           end
-
-    unless author_xml.at_xpath('./poco:note').nil?
-      account.note = author_xml.at_xpath('./poco:note', poco: POCO_NS).content
-    end
-
-    unless author_xml.at_xpath('./xmlns:link[@rel="avatar"]').nil?
-      account.avatar_remote_url = author_xml.at_xpath('./xmlns:link[@rel="avatar"]').attribute('href').value
+    unless author_xml.nil?
+      account.display_name      = author_xml.at_xpath('./poco:displayName', poco: POCO_NS).content unless author_xml.at_xpath('./poco:displayName', poco: POCO_NS).nil?
+      account.note              = author_xml.at_xpath('./poco:note', poco: POCO_NS).content unless author_xml.at_xpath('./poco:note').nil?
+      account.avatar_remote_url = author_xml.at_xpath('./xmlns:link[@rel="avatar"]')['href'] unless author_xml.at_xpath('./xmlns:link[@rel="avatar"]').nil? || author_xml.at_xpath('./xmlns:link[@rel="avatar"]')['href'].blank?
     end
 
+    old_hub_url     = account.hub_url
+    account.hub_url = hub_link['href'] if !hub_link.nil? && !hub_link['href'].blank? && (hub_link['href'] != old_hub_url)
     account.save!
+
+    SubscribeService.new.call(account) if resubscribe && (account.hub_url != old_hub_url)
   end
 end

spec/controllers/api/salmon_controller_spec.rb

@@ -6,6 +6,7 @@ RSpec.describe Api::SalmonController, type: :controller do
   let(:account) { Fabricate(:user, account: Fabricate(:account, username: 'catsrgr8')).account }
 
   before do
+    stub_request(:post, "https://pubsubhubbub.superfeedr.com/").to_return(:status => 200, :body => "", :headers => {})
     stub_request(:get, "https://quitter.no/.well-known/host-meta").to_return(request_fixture('.host-meta.txt'))
     stub_request(:get, "https://quitter.no/.well-known/webfinger?resource=acct:gargron@quitter.no").to_return(request_fixture('webfinger.txt'))
     stub_request(:get, "https://quitter.no/api/statuses/user_timeline/7477.atom").to_return(request_fixture('feed.txt'))

spec/controllers/api/subscriptions_controller_spec.rb

@@ -23,6 +23,7 @@ RSpec.describe Api::SubscriptionsController, type: :controller do
     let(:feed) { File.read(File.join(Rails.root, 'spec', 'fixtures', 'push', 'feed.atom')) }
 
     before do
+      stub_request(:post, "https://quitter.no/main/push/hub").to_return(:status => 200, :body => "", :headers => {})
       stub_request(:get, "https://quitter.no/avatar/7477-300-20160211190340.png").to_return(request_fixture('avatar.txt'))
       stub_request(:head, "https://quitter.no/notice/1269244").to_return(status: 404)
       stub_request(:head, "https://quitter.no/notice/1265331").to_return(status: 404)
@@ -37,7 +38,7 @@ RSpec.describe Api::SubscriptionsController, type: :controller do
       stub_request(:head, "https://social.umeahackerspace.se/user/2").to_return(status: 404)
       stub_request(:head, "https://gs.kawa-kun.com/user/2").to_return(status: 404)
       stub_request(:head, "https://mastodon.social/users/Gargron").to_return(status: 404)
-      
+
       request.env['HTTP_X_HUB_SIGNATURE'] = "sha1=#{OpenSSL::HMAC.hexdigest('sha1', 'abc', feed)}"
       request.env['RAW_POST_DATA'] = feed
 

spec/services/process_feed_service_spec.rb

@@ -7,6 +7,7 @@ RSpec.describe ProcessFeedService do
   subject { ProcessFeedService.new }
 
   before do
+    stub_request(:post, "https://pubsubhubbub.superfeedr.com/").to_return(:status => 200, :body => "", :headers => {})
     stub_request(:get, "http://kickass.zone/system/accounts/avatars/000/000/001/large/eris.png").to_return(request_fixture('avatar.txt'))
     stub_request(:get, "http://kickass.zone/system/media_attachments/files/000/000/002/original/morpheus_linux.jpg?1476059910").to_return(request_fixture('attachment1.txt'))
     stub_request(:get, "http://kickass.zone/system/media_attachments/files/000/000/003/original/gizmo.jpg?1476060065").to_return(request_fixture('attachment2.txt'))

spec/services/update_remote_profile_service_spec.rb

 require 'rails_helper'
 
 RSpec.describe UpdateRemoteProfileService do
-  let(:xml) { Nokogiri::XML(File.read(File.join(Rails.root, 'spec', 'fixtures', 'push', 'feed.atom'))).at_xpath('//xmlns:author') }
+  let(:xml) { Nokogiri::XML(File.read(File.join(Rails.root, 'spec', 'fixtures', 'push', 'feed.atom'))).at_xpath('//xmlns:feed') }
 
   subject { UpdateRemoteProfileService.new }
 
@@ -13,7 +13,7 @@ RSpec.describe UpdateRemoteProfileService do
     let(:remote_account) { Fabricate(:account, username: 'bob', domain: 'example.com') }
 
     before do
-      subject.(xml, remote_account)
+      subject.call(xml, remote_account)
     end
 
     it 'downloads new avatar' do
@@ -34,10 +34,10 @@ RSpec.describe UpdateRemoteProfileService do
   end
 
   context 'with unchanged details' do
-    let(:remote_account) { Fabricate(:account, username: 'bob', domain: 'example.com',display_name: 'ＤＩＧＩＴＡＬ ＣＡＴ', note: 'Software engineer, free time musician and ＤＩＧＩＴＡＬ ＳＰＯＲＴＳ enthusiast. Likes cats. Warning: May contain memes', avatar_remote_url: 'https://quitter.no/avatar/7477-300-20160211190340.png') }
+    let(:remote_account) { Fabricate(:account, username: 'bob', domain: 'example.com', display_name: 'ＤＩＧＩＴＡＬ ＣＡＴ', note: 'Software engineer, free time musician and ＤＩＧＩＴＡＬ ＳＰＯＲＴＳ enthusiast. Likes cats. Warning: May contain memes', avatar_remote_url: 'https://quitter.no/avatar/7477-300-20160211190340.png') }
 
     before do
-      subject.(xml, remote_account)
+      subject.call(xml, remote_account)
     end
 
     it 'does not re-download avatar' do