Introduce Ostatus name space (#4164)

* Wrap methods of ProcessFeedService::ProcessEntry in classes

This is a change same with 425acecfdb15093a265b191120fb2d4e4c4135c4, except
that it has the following changes:

* Revert irrelevant change in find_or_create_conversation
* Fix error handling for RemoteActivity

* Introduce Ostatus name space

1 files changed, 165 insertions, 165 deletions

diff --git a/spec/lib/atom_serializer_spec.rb b/spec/lib/ostatus/atom_serializer_spec.rb
index d14fc5b40..8caef9355 100644
--- a/spec/lib/atom_serializer_spec.rb
+++ b/spec/lib/ostatus/atom_serializer_spec.rb
@@ -1,6 +1,6 @@
 require 'rails_helper'
 
-RSpec.describe AtomSerializer do
+RSpec.describe Ostatus::AtomSerializer do
   shared_examples 'follow request salmon' do
     it 'appends author element with account' do
       account = Fabricate(:account, domain: nil, username: 'username')
@@ -108,7 +108,7 @@ RSpec.describe AtomSerializer do
     it 'returns XML with emojis' do
       element = Ox::Element.new('tag')
       element << '💩'
-      xml = AtomSerializer.render(element)
+      xml = Ostatus::AtomSerializer.render(element)
 
       expect(xml).to eq "<?xml version=\"1.0\"?>\n<tag>💩</tag>\n"
     end
@@ -116,7 +116,7 @@ RSpec.describe AtomSerializer do
     it 'returns XML, stripping invalid characters like \b and \v' do
       element = Ox::Element.new('tag')
       element << "im l33t\b haxo\b\vr"
-      xml = AtomSerializer.render(element)
+      xml = Ostatus::AtomSerializer.render(element)
 
       expect(xml).to eq "<?xml version=\"1.0\"?>\n<tag>im l33t haxor</tag>\n"
     end
@@ -127,7 +127,7 @@ RSpec.describe AtomSerializer do
       it 'appends poco:note element with note for local account' do
         account = Fabricate(:account, domain: nil, note: '<p>note</p>')
 
-        author = AtomSerializer.new.author(account)
+        author = Ostatus::AtomSerializer.new.author(account)
 
         note = author.nodes.find { |node| node.name == 'poco:note' }
         expect(note.text).to eq '<p>note</p>'
@@ -136,7 +136,7 @@ RSpec.describe AtomSerializer do
       it 'appends poco:note element with tags-stripped note for remote account' do
         account = Fabricate(:account, domain: 'remote', note: '<p>note</p>')
 
-        author = AtomSerializer.new.author(account)
+        author = Ostatus::AtomSerializer.new.author(account)
 
         note = author.nodes.find { |node| node.name == 'poco:note' }
         expect(note.text).to eq 'note'
@@ -144,7 +144,7 @@ RSpec.describe AtomSerializer do
 
       it 'appends summary element with type attribute and simplified note if present' do
         account = Fabricate(:account, note: 'note')
-        author = AtomSerializer.new.author(account)
+        author = Ostatus::AtomSerializer.new.author(account)
         expect(author.summary.text).to eq '<p>note</p>'
         expect(author.summary[:type]).to eq 'html'
       end
@@ -153,27 +153,27 @@ RSpec.describe AtomSerializer do
     context 'when note is not present' do
       it 'does not append poco:note element' do
         account = Fabricate(:account, note: '')
-        author = AtomSerializer.new.author(account)
+        author = Ostatus::AtomSerializer.new.author(account)
         author.nodes.each { |node| expect(node.name).not_to eq 'poco:note' }
       end
 
       it 'does not append summary element' do
         account = Fabricate(:account, note: '')
-        author = AtomSerializer.new.author(account)
+        author = Ostatus::AtomSerializer.new.author(account)
         author.nodes.each { |node| expect(node.name).not_to eq 'summary' }
       end
     end
 
     it 'returns author element' do
       account = Fabricate(:account)
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
       expect(author.name).to eq 'author'
     end
 
     it 'appends activity:object-type element with person type' do
       account = Fabricate(:account, domain: nil, username: 'username')
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       object_type = author.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq TagManager::TYPES[:person]
@@ -181,20 +181,20 @@ RSpec.describe AtomSerializer do
 
     it 'appends email element with username and domain for local account' do
       account = Fabricate(:account, username: 'username')
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
       expect(author.email.text).to eq 'username@cb6e6126.ngrok.io'
     end
 
     it 'appends email element with username and domain for remote user' do
       account = Fabricate(:account, domain: 'domain', username: 'username')
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
       expect(author.email.text).to eq 'username@domain'
     end
 
     it 'appends link element for an alternative' do
       account = Fabricate(:account, domain: nil, username: 'username')
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       link = author.nodes.find { |node| node.name == 'link' && node[:rel] == 'alternate' }
       expect(link[:type]).to eq 'text/html'
@@ -205,7 +205,7 @@ RSpec.describe AtomSerializer do
     it 'has link element for avatar if present' do
       account = Fabricate(:account, avatar: attachment_fixture('avatar.gif'))
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       link = author.nodes.find { |node| node.name == 'link' && node[:rel] == 'avatar' }
       expect(link[:type]).to eq 'image/gif'
@@ -217,7 +217,7 @@ RSpec.describe AtomSerializer do
     it 'does not have link element for avatar if not present' do
       account = Fabricate(:account, avatar: nil)
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       author.nodes.each do |node|
         expect(node[:rel]).not_to eq 'avatar' if node.name == 'link'
@@ -227,7 +227,7 @@ RSpec.describe AtomSerializer do
     it 'appends link element for header if present' do
       account = Fabricate(:account, header: attachment_fixture('avatar.gif'))
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       link = author.nodes.find { |node| node.name == 'link' && node[:rel] == 'header' }
       expect(link[:type]).to eq 'image/gif'
@@ -239,7 +239,7 @@ RSpec.describe AtomSerializer do
     it 'does not append link element for header if not present' do
       account = Fabricate(:account, header: nil)
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       author.nodes.each do |node|
         expect(node[:rel]).not_to eq 'header' if node.name == 'link'
@@ -249,7 +249,7 @@ RSpec.describe AtomSerializer do
     it 'appends poco:displayName element with display name if present' do
       account = Fabricate(:account, display_name: 'display name')
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       display_name = author.nodes.find { |node| node.name == 'poco:displayName' }
       expect(display_name.text).to eq 'display name'
@@ -257,14 +257,14 @@ RSpec.describe AtomSerializer do
 
     it 'does not append poco:displayName element with display name if not present' do
       account = Fabricate(:account, display_name: '')
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
       author.nodes.each { |node| expect(node.name).not_to eq 'poco:displayName' }
     end
 
     it "appends mastodon:scope element with 'private' if locked" do
       account = Fabricate(:account, locked: true)
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       scope = author.nodes.find { |node| node.name == 'mastodon:scope' }
       expect(scope.text).to eq 'private'
@@ -273,7 +273,7 @@ RSpec.describe AtomSerializer do
     it "appends mastodon:scope element with 'public' if unlocked" do
       account = Fabricate(:account, locked: false)
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       scope = author.nodes.find { |node| node.name == 'mastodon:scope' }
       expect(scope.text).to eq 'public'
@@ -282,7 +282,7 @@ RSpec.describe AtomSerializer do
     it 'includes URI' do
       account = Fabricate(:account, domain: nil, username: 'username')
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       expect(author.id.text).to eq 'https://cb6e6126.ngrok.io/users/username'
       expect(author.uri.text).to eq 'https://cb6e6126.ngrok.io/users/username'
@@ -291,7 +291,7 @@ RSpec.describe AtomSerializer do
     it 'includes username' do
       account = Fabricate(:account, username: 'username')
 
-      author = AtomSerializer.new.author(account)
+      author = Ostatus::AtomSerializer.new.author(account)
 
       name = author.nodes.find { |node| node.name == 'name' }
       username = author.nodes.find { |node| node.name == 'poco:preferredUsername' }
@@ -317,7 +317,7 @@ RSpec.describe AtomSerializer do
       include_examples 'namespaces' do
         def serialize
           stream_entry = Fabricate(:stream_entry)
-          AtomSerializer.new.entry(stream_entry, true)
+          Ostatus::AtomSerializer.new.entry(stream_entry, true)
         end
       end
 
@@ -325,7 +325,7 @@ RSpec.describe AtomSerializer do
         account = Fabricate(:account, username: 'username')
         status = Fabricate(:status, account: account)
 
-        entry = AtomSerializer.new.entry(status.stream_entry, true)
+        entry = Ostatus::AtomSerializer.new.entry(status.stream_entry, true)
 
         expect(entry.author.id.text).to eq 'https://cb6e6126.ngrok.io/users/username'
       end
@@ -334,14 +334,14 @@ RSpec.describe AtomSerializer do
     context 'if status is present' do
       include_examples 'status attributes' do
         def serialize(status)
-          AtomSerializer.new.entry(status.stream_entry, true)
+          Ostatus::AtomSerializer.new.entry(status.stream_entry, true)
         end
       end
 
       it 'appends link element for the public collection if status is publicly visible' do
         status = Fabricate(:status, visibility: :public)
 
-        entry = AtomSerializer.new.entry(status.stream_entry)
+        entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
         mentioned_person = entry.nodes.find do |node|
           node.name == 'link' &&
@@ -354,7 +354,7 @@ RSpec.describe AtomSerializer do
       it 'does not append link element for the public collection if status is not publicly visible' do
         status = Fabricate(:status, visibility: :private)
 
-        entry = AtomSerializer.new.entry(status.stream_entry)
+        entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
         entry.nodes.each do |node|
           if node.name == 'link' &&
@@ -369,14 +369,14 @@ RSpec.describe AtomSerializer do
         tag = Fabricate(:tag, name: 'tag')
         status = Fabricate(:status, tags: [ tag ])
 
-        entry = AtomSerializer.new.entry(status.stream_entry)
+        entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
         expect(entry.category[:term]).to eq 'tag'
       end
 
       it 'appends category element for NSFW if status is sensitive' do
         status = Fabricate(:status, sensitive: true)
-        entry = AtomSerializer.new.entry(status.stream_entry)
+        entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
         expect(entry.category[:term]).to eq 'nsfw'
       end
 
@@ -385,7 +385,7 @@ RSpec.describe AtomSerializer do
         media_attachment = Fabricate(:media_attachment, file: file)
         status = Fabricate(:status, media_attachments: [ media_attachment ])
 
-        entry = AtomSerializer.new.entry(status.stream_entry)
+        entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
         enclosure = entry.nodes.find { |node| node.name == 'link' && node[:rel] == 'enclosure' }
         expect(enclosure[:type]).to eq 'image/jpeg'
@@ -395,7 +395,7 @@ RSpec.describe AtomSerializer do
       it 'appends mastodon:scope element with visibility' do
         status = Fabricate(:status, visibility: :public)
 
-        entry = AtomSerializer.new.entry(status.stream_entry)
+        entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
         scope = entry.nodes.find { |node| node.name == 'mastodon:scope' }
         expect(scope.text).to eq 'public'
@@ -406,8 +406,8 @@ RSpec.describe AtomSerializer do
         remote_status = Fabricate(:status, account: remote_account)
         remote_status.stream_entry.update!(created_at: '2000-01-01T00:00:00Z')
 
-        entry = AtomSerializer.new.entry(remote_status.stream_entry, true)
-        xml = AtomSerializer.render(entry).gsub('cb6e6126.ngrok.io', 'remote')
+        entry = Ostatus::AtomSerializer.new.entry(remote_status.stream_entry, true)
+        xml = Ostatus::AtomSerializer.render(entry).gsub('cb6e6126.ngrok.io', 'remote')
 
         remote_status.destroy!
         remote_account.destroy!
@@ -429,7 +429,7 @@ RSpec.describe AtomSerializer do
         status = Fabricate(:status)
         status.destroy!
 
-        entry = AtomSerializer.new.entry(status.stream_entry)
+        entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
         expect(entry.content.text).to eq 'Deleted status'
       end
@@ -439,7 +439,7 @@ RSpec.describe AtomSerializer do
         status = Fabricate(:status, account: account)
         status.destroy!
 
-        entry = AtomSerializer.new.entry(status.stream_entry)
+        entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
         expect(entry.title.text).to eq 'username deleted status'
       end
@@ -447,19 +447,19 @@ RSpec.describe AtomSerializer do
 
     context 'it is not root' do
       let(:stream_entry) { Fabricate(:stream_entry) }
-      subject { AtomSerializer.new.entry(stream_entry, false) }
+      subject { Ostatus::AtomSerializer.new.entry(stream_entry, false) }
       include_examples 'not root'
     end
 
     context 'without root parameter' do
       let(:stream_entry) { Fabricate(:stream_entry) }
-      subject { AtomSerializer.new.entry(stream_entry) }
+      subject { Ostatus::AtomSerializer.new.entry(stream_entry) }
       include_examples 'not root'
     end
 
     it 'returns entry element' do
       stream_entry = Fabricate(:stream_entry)
-      entry = AtomSerializer.new.entry(stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(stream_entry)
       expect(entry.name).to eq 'entry'
     end
 
@@ -467,33 +467,33 @@ RSpec.describe AtomSerializer do
       status = Fabricate(:status, reblog_of_id: nil)
       status.stream_entry.update!(created_at: '2000-01-01T00:00:00Z')
 
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
       expect(entry.id.text).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{status.id}:objectType=Status"
     end
 
     it 'appends published element with created date' do
       stream_entry = Fabricate(:stream_entry, created_at: '2000-01-01T00:00:00Z')
-      entry = AtomSerializer.new.entry(stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(stream_entry)
       expect(entry.published.text).to eq '2000-01-01T00:00:00Z'
     end
 
     it 'appends updated element with updated date' do
       stream_entry = Fabricate(:stream_entry, updated_at: '2000-01-01T00:00:00Z')
-      entry = AtomSerializer.new.entry(stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(stream_entry)
       expect(entry.updated.text).to eq '2000-01-01T00:00:00Z'
     end
 
     it 'appends title element with status title' do
       account = Fabricate(:account, username: 'username')
       status = Fabricate(:status, account: account, reblog_of_id: nil)
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
       expect(entry.title.text).to eq 'New status by username'
     end
 
     it 'appends activity:object-type element with object type' do
       status = Fabricate(:status)
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
       object_type = entry.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq TagManager::TYPES[:note]
     end
@@ -501,7 +501,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:verb element with object type' do
       status = Fabricate(:status)
 
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
       object_type = entry.nodes.find { |node| node.name == 'activity:verb' }
       expect(object_type.text).to eq TagManager::VERBS[:post]
@@ -511,7 +511,7 @@ RSpec.describe AtomSerializer do
       reblogged = Fabricate(:status, created_at: '2000-01-01T00:00:00Z')
       reblog = Fabricate(:status, reblog: reblogged)
 
-      entry = AtomSerializer.new.entry(reblog.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(reblog.stream_entry)
 
       object = entry.nodes.find { |node| node.name == 'activity:object' }
       expect(object.id.text).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{reblogged.id}:objectType=Status"
@@ -519,7 +519,7 @@ RSpec.describe AtomSerializer do
 
     it 'does not append activity:object element if target is not present' do
       status = Fabricate(:status, reblog_of_id: nil)
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
       entry.nodes.each { |node| expect(node.name).not_to eq 'activity:object' }
     end
 
@@ -527,7 +527,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, username: 'username')
       status = Fabricate(:status, account: account)
 
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
       link = entry.nodes.find { |node| node.name == 'link' && node[:rel] == 'alternate' }
       expect(link[:type]).to eq 'text/html'
@@ -538,7 +538,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, username: 'username')
       status = Fabricate(:status, account: account)
 
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
       link = entry.nodes.find { |node| node.name == 'link' && node[:rel] == 'self' }
       expect(link[:type]).to eq 'application/atom+xml'
@@ -549,7 +549,7 @@ RSpec.describe AtomSerializer do
       in_reply_to_status = Fabricate(:status, created_at: '2000-01-01T00:00:00Z', reblog_of_id: nil)
       reply_status = Fabricate(:status, in_reply_to_id: in_reply_to_status.id)
 
-      entry = AtomSerializer.new.entry(reply_status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(reply_status.stream_entry)
 
       in_reply_to = entry.nodes.find { |node| node.name == 'thr:in-reply-to' }
       expect(in_reply_to[:ref]).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{in_reply_to_status.id}:objectType=Status"
@@ -557,7 +557,7 @@ RSpec.describe AtomSerializer do
 
     it 'does not append thr:in-reply-to element if not threaded' do
       status = Fabricate(:status)
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
       entry.nodes.each { |node| expect(node.name).not_to eq 'thr:in-reply-to' }
     end
 
@@ -565,7 +565,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate(:status)
       status.conversation.update!(created_at: '2000-01-01T00:00:00Z')
 
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
       conversation = entry.nodes.find { |node| node.name == 'ostatus:conversation' }
       expect(conversation[:ref]).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{status.conversation_id}:objectType=Conversation"
@@ -575,7 +575,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate.build(:status, conversation_id: nil)
       status.save!(validate: false)
 
-      entry = AtomSerializer.new.entry(status.stream_entry)
+      entry = Ostatus::AtomSerializer.new.entry(status.stream_entry)
 
       entry.nodes.each { |node| expect(node.name).not_to eq 'ostatus:conversation' }
     end
@@ -585,62 +585,62 @@ RSpec.describe AtomSerializer do
     include_examples 'namespaces' do
       def serialize
         account = Fabricate(:account)
-        AtomSerializer.new.feed(account, [])
+        Ostatus::AtomSerializer.new.feed(account, [])
       end
     end
 
     it 'returns feed element' do
       account = Fabricate(:account)
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
       expect(feed.name).to eq 'feed'
     end
 
     it 'appends id element with account Atom URL' do
       account = Fabricate(:account, username: 'username')
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
       expect(feed.id.text).to eq 'https://cb6e6126.ngrok.io/users/username.atom'
     end
 
     it 'appends title element with account display name if present' do
       account = Fabricate(:account, display_name: 'display name')
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
       expect(feed.title.text).to eq 'display name'
     end
 
     it 'does not append title element with account username if account display name is not present' do
       account = Fabricate(:account, display_name: '', username: 'username')
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
       expect(feed.title.text).to eq 'username'
     end
 
     it 'appends subtitle element with account note' do
       account = Fabricate(:account, note: 'note')
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
       expect(feed.subtitle.text).to eq 'note'
     end
 
     it 'appends updated element with date account got updated' do
       account = Fabricate(:account, updated_at: '2000-01-01T00:00:00Z')
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
       expect(feed.updated.text).to eq '2000-01-01T00:00:00Z'
     end
 
     it 'appends logo element with full asset URL for original account avatar' do
       account = Fabricate(:account, avatar: attachment_fixture('avatar.gif'))
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
       expect(feed.logo.text).to match /^https:\/\/cb6e6126.ngrok.io\/system\/accounts\/avatars\/.+\/original\/avatar.gif/
     end
 
     it 'appends author element' do
       account = Fabricate(:account, username: 'username')
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
       expect(feed.author.id.text).to eq 'https://cb6e6126.ngrok.io/users/username'
     end
 
     it 'appends link element for an alternative' do
       account = Fabricate(:account, username: 'username')
 
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
 
       link = feed.nodes.find { |node| node.name == 'link' && node[:rel] == 'alternate' }
       expect(link[:type]).to eq 'text/html'
@@ -650,7 +650,7 @@ RSpec.describe AtomSerializer do
     it 'appends link element for itself' do
       account = Fabricate(:account, username: 'username')
 
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
 
       link = feed.nodes.find { |node| node.name == 'link' && node[:rel] == 'self' }
       expect(link[:type]).to eq 'application/atom+xml'
@@ -661,7 +661,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, username: 'username')
       stream_entry = Fabricate(:stream_entry)
 
-      feed = AtomSerializer.new.feed(account, Array.new(20, stream_entry))
+      feed = Ostatus::AtomSerializer.new.feed(account, Array.new(20, stream_entry))
 
       link = feed.nodes.find { |node| node.name == 'link' && node[:rel] == 'next' }
       expect(link[:type]).to eq 'application/atom+xml'
@@ -671,7 +671,7 @@ RSpec.describe AtomSerializer do
     it 'does not append link element for the next if it does not have 20 stream entries' do
       account = Fabricate(:account, username: 'username')
 
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
 
       feed.nodes.each do |node|
         expect(node[:rel]).not_to eq 'next' if node.name == 'link'
@@ -681,7 +681,7 @@ RSpec.describe AtomSerializer do
     it 'appends link element for hub' do
       account = Fabricate(:account, username: 'username')
 
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
 
       link = feed.nodes.find { |node| node.name == 'link' && node[:rel] == 'hub' }
       expect(link[:href]).to eq 'https://cb6e6126.ngrok.io/api/push'
@@ -690,7 +690,7 @@ RSpec.describe AtomSerializer do
     it 'appends link element for Salmon' do
       account = Fabricate(:account, username: 'username')
 
-      feed = AtomSerializer.new.feed(account, [])
+      feed = Ostatus::AtomSerializer.new.feed(account, [])
 
       link = feed.nodes.find { |node| node.name == 'link' && node[:rel] == 'salmon' }
       expect(link[:href]).to start_with 'https://cb6e6126.ngrok.io/api/salmon/'
@@ -700,7 +700,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, username: 'username')
       status = Fabricate(:status, account: account)
 
-      feed = AtomSerializer.new.feed(account, [status.stream_entry])
+      feed = Ostatus::AtomSerializer.new.feed(account, [status.stream_entry])
 
       expect(feed.entry.title.text).to eq 'New status by username'
     end
@@ -710,13 +710,13 @@ RSpec.describe AtomSerializer do
     include_examples 'namespaces' do
       def serialize
         block = Fabricate(:block)
-        AtomSerializer.new.block_salmon(block)
+        Ostatus::AtomSerializer.new.block_salmon(block)
       end
     end
 
     it 'returns entry element' do
       block = Fabricate(:block)
-      block_salmon = AtomSerializer.new.block_salmon(block)
+      block_salmon = Ostatus::AtomSerializer.new.block_salmon(block)
       expect(block_salmon.name).to eq 'entry'
     end
 
@@ -724,7 +724,7 @@ RSpec.describe AtomSerializer do
       block = Fabricate(:block)
 
       time_before = Time.now
-      block_salmon = AtomSerializer.new.block_salmon(block)
+      block_salmon = Ostatus::AtomSerializer.new.block_salmon(block)
       time_after = Time.now
 
       expect(block_salmon.id.text).to(
@@ -738,7 +738,7 @@ RSpec.describe AtomSerializer do
       target_account = Fabricate(:account, domain: 'remote', username: 'target_account')
       block = Fabricate(:block, account: account, target_account: target_account)
 
-      block_salmon = AtomSerializer.new.block_salmon(block)
+      block_salmon = Ostatus::AtomSerializer.new.block_salmon(block)
 
       expect(block_salmon.title.text).to eq 'account no longer wishes to interact with target_account@remote'
     end
@@ -747,7 +747,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, domain: nil, username: 'account')
       block = Fabricate(:block, account: account)
 
-      block_salmon = AtomSerializer.new.block_salmon(block)
+      block_salmon = Ostatus::AtomSerializer.new.block_salmon(block)
 
       expect(block_salmon.author.id.text).to eq 'https://cb6e6126.ngrok.io/users/account'
     end
@@ -755,7 +755,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:object-type element with activity type' do
       block = Fabricate(:block)
 
-      block_salmon = AtomSerializer.new.block_salmon(block)
+      block_salmon = Ostatus::AtomSerializer.new.block_salmon(block)
 
       object_type = block_salmon.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq TagManager::TYPES[:activity]
@@ -764,7 +764,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:verb element with block' do
       block = Fabricate(:block)
 
-      block_salmon = AtomSerializer.new.block_salmon(block)
+      block_salmon = Ostatus::AtomSerializer.new.block_salmon(block)
 
       verb = block_salmon.nodes.find { |node| node.name == 'activity:verb' }
       expect(verb.text).to eq TagManager::VERBS[:block]
@@ -774,7 +774,7 @@ RSpec.describe AtomSerializer do
       target_account = Fabricate(:account, domain: 'domain', uri: 'https://domain/id')
       block = Fabricate(:block, target_account: target_account)
 
-      block_salmon = AtomSerializer.new.block_salmon(block)
+      block_salmon = Ostatus::AtomSerializer.new.block_salmon(block)
 
       object = block_salmon.nodes.find { |node| node.name == 'activity:object' }
       expect(object.id.text).to eq 'https://domain/id'
@@ -782,8 +782,8 @@ RSpec.describe AtomSerializer do
 
     it 'returns element whose rendered view triggers block when processed' do
       block = Fabricate(:block)
-      block_salmon = AtomSerializer.new.block_salmon(block)
-      xml = AtomSerializer.render(block_salmon)
+      block_salmon = Ostatus::AtomSerializer.new.block_salmon(block)
+      xml = Ostatus::AtomSerializer.render(block_salmon)
       envelope = OStatus2::Salmon.new.pack(xml, block.account.keypair)
       block.destroy!
 
@@ -797,13 +797,13 @@ RSpec.describe AtomSerializer do
     include_examples 'namespaces' do
       def serialize
         block = Fabricate(:block)
-        AtomSerializer.new.unblock_salmon(block)
+        Ostatus::AtomSerializer.new.unblock_salmon(block)
       end
     end
 
     it 'returns entry element' do
       block = Fabricate(:block)
-      unblock_salmon = AtomSerializer.new.unblock_salmon(block)
+      unblock_salmon = Ostatus::AtomSerializer.new.unblock_salmon(block)
       expect(unblock_salmon.name).to eq 'entry'
     end
 
@@ -811,7 +811,7 @@ RSpec.describe AtomSerializer do
       block = Fabricate(:block)
 
       time_before = Time.now
-      unblock_salmon = AtomSerializer.new.unblock_salmon(block)
+      unblock_salmon = Ostatus::AtomSerializer.new.unblock_salmon(block)
       time_after = Time.now
 
       expect(unblock_salmon.id.text).to(
@@ -825,7 +825,7 @@ RSpec.describe AtomSerializer do
       target_account = Fabricate(:account, domain: 'remote', username: 'target_account')
       block = Fabricate(:block, account: account, target_account: target_account)
 
-      unblock_salmon = AtomSerializer.new.unblock_salmon(block)
+      unblock_salmon = Ostatus::AtomSerializer.new.unblock_salmon(block)
 
       expect(unblock_salmon.title.text).to eq 'account no longer blocks target_account@remote'
     end
@@ -834,7 +834,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, domain: nil, username: 'account')
       block = Fabricate(:block, account: account)
 
-      unblock_salmon = AtomSerializer.new.unblock_salmon(block)
+      unblock_salmon = Ostatus::AtomSerializer.new.unblock_salmon(block)
 
       expect(unblock_salmon.author.id.text).to eq 'https://cb6e6126.ngrok.io/users/account'
     end
@@ -842,7 +842,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:object-type element with activity type' do
       block = Fabricate(:block)
 
-      unblock_salmon = AtomSerializer.new.unblock_salmon(block)
+      unblock_salmon = Ostatus::AtomSerializer.new.unblock_salmon(block)
 
       object_type = unblock_salmon.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq TagManager::TYPES[:activity]
@@ -851,7 +851,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:verb element with block' do
       block = Fabricate(:block)
 
-      unblock_salmon = AtomSerializer.new.unblock_salmon(block)
+      unblock_salmon = Ostatus::AtomSerializer.new.unblock_salmon(block)
 
       verb = unblock_salmon.nodes.find { |node| node.name == 'activity:verb' }
       expect(verb.text).to eq TagManager::VERBS[:unblock]
@@ -861,7 +861,7 @@ RSpec.describe AtomSerializer do
       target_account = Fabricate(:account, domain: 'domain', uri: 'https://domain/id')
       block = Fabricate(:block, target_account: target_account)
 
-      unblock_salmon = AtomSerializer.new.unblock_salmon(block)
+      unblock_salmon = Ostatus::AtomSerializer.new.unblock_salmon(block)
 
       object = unblock_salmon.nodes.find { |node| node.name == 'activity:object' }
       expect(object.id.text).to eq 'https://domain/id'
@@ -869,8 +869,8 @@ RSpec.describe AtomSerializer do
 
     it 'returns element whose rendered view triggers block when processed' do
       block = Fabricate(:block)
-      unblock_salmon = AtomSerializer.new.unblock_salmon(block)
-      xml = AtomSerializer.render(unblock_salmon)
+      unblock_salmon = Ostatus::AtomSerializer.new.unblock_salmon(block)
+      xml = Ostatus::AtomSerializer.render(unblock_salmon)
       envelope = OStatus2::Salmon.new.pack(xml, block.account.keypair)
 
       ProcessInteractionService.new.call(envelope, block.target_account)
@@ -883,19 +883,19 @@ RSpec.describe AtomSerializer do
     include_examples 'namespaces' do
       def serialize
         favourite = Fabricate(:favourite)
-        AtomSerializer.new.favourite_salmon(favourite)
+        Ostatus::AtomSerializer.new.favourite_salmon(favourite)
       end
     end
 
     it 'returns entry element' do
       favourite = Fabricate(:favourite)
-      favourite_salmon = AtomSerializer.new.favourite_salmon(favourite)
+      favourite_salmon = Ostatus::AtomSerializer.new.favourite_salmon(favourite)
       expect(favourite_salmon.name).to eq 'entry'
     end
 
     it 'appends id element with unique tag' do
       favourite = Fabricate(:favourite, created_at: '2000-01-01T00:00:00Z')
-      favourite_salmon = AtomSerializer.new.favourite_salmon(favourite)
+      favourite_salmon = Ostatus::AtomSerializer.new.favourite_salmon(favourite)
       expect(favourite_salmon.id.text).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{favourite.id}:objectType=Favourite"
     end
 
@@ -903,7 +903,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, domain: nil, username: 'username')
       favourite = Fabricate(:favourite, account: account)
 
-      favourite_salmon = AtomSerializer.new.favourite_salmon(favourite)
+      favourite_salmon = Ostatus::AtomSerializer.new.favourite_salmon(favourite)
 
       expect(favourite_salmon.author.id.text).to eq 'https://cb6e6126.ngrok.io/users/username'
     end
@@ -911,7 +911,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:object-type element with activity type' do
       favourite = Fabricate(:favourite)
 
-      favourite_salmon = AtomSerializer.new.favourite_salmon(favourite)
+      favourite_salmon = Ostatus::AtomSerializer.new.favourite_salmon(favourite)
 
       object_type = favourite_salmon.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq 'http://activitystrea.ms/schema/1.0/activity'
@@ -920,7 +920,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:verb element with favorite' do
       favourite = Fabricate(:favourite)
 
-      favourite_salmon = AtomSerializer.new.favourite_salmon(favourite)
+      favourite_salmon = Ostatus::AtomSerializer.new.favourite_salmon(favourite)
 
       verb = favourite_salmon.nodes.find { |node| node.name == 'activity:verb' }
       expect(verb.text).to eq TagManager::VERBS[:favorite]
@@ -930,7 +930,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate(:status, created_at: '2000-01-01T00:00:00Z')
       favourite = Fabricate(:favourite, status: status)
 
-      favourite_salmon = AtomSerializer.new.favourite_salmon(favourite)
+      favourite_salmon = Ostatus::AtomSerializer.new.favourite_salmon(favourite)
 
       object = favourite_salmon.nodes.find { |node| node.name == 'activity:object' }
       expect(object.id.text).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{status.id}:objectType=Status"
@@ -941,7 +941,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate(:status, account: status_account, created_at: '2000-01-01T00:00:00Z')
       favourite = Fabricate(:favourite, status: status)
 
-      favourite_salmon = AtomSerializer.new.favourite_salmon(favourite)
+      favourite_salmon = Ostatus::AtomSerializer.new.favourite_salmon(favourite)
 
       in_reply_to = favourite_salmon.nodes.find { |node| node.name == 'thr:in-reply-to' }
       expect(in_reply_to.ref).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{status.id}:objectType=Status"
@@ -954,7 +954,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate(:status, account: status_account)
       favourite = Fabricate(:favourite, account: account, status: status)
 
-      favourite_salmon = AtomSerializer.new.favourite_salmon(favourite)
+      favourite_salmon = Ostatus::AtomSerializer.new.favourite_salmon(favourite)
 
       expect(favourite_salmon.title.text).to eq 'account favourited a status by status_account@remote'
       expect(favourite_salmon.content.text).to eq 'account favourited a status by status_account@remote'
@@ -962,8 +962,8 @@ RSpec.describe AtomSerializer do
 
     it 'returns element whose rendered view triggers favourite when processed' do
       favourite = Fabricate(:favourite)
-      favourite_salmon = AtomSerializer.new.favourite_salmon(favourite)
-      xml = AtomSerializer.render(favourite_salmon)
+      favourite_salmon = Ostatus::AtomSerializer.new.favourite_salmon(favourite)
+      xml = Ostatus::AtomSerializer.render(favourite_salmon)
       envelope = OStatus2::Salmon.new.pack(xml, favourite.account.keypair)
       favourite.destroy!
 
@@ -976,13 +976,13 @@ RSpec.describe AtomSerializer do
     include_examples 'namespaces' do
       def serialize
         favourite = Fabricate(:favourite)
-        AtomSerializer.new.favourite_salmon(favourite)
+        Ostatus::AtomSerializer.new.favourite_salmon(favourite)
       end
     end
 
     it 'returns entry element' do
       favourite = Fabricate(:favourite)
-      unfavourite_salmon = AtomSerializer.new.unfavourite_salmon(favourite)
+      unfavourite_salmon = Ostatus::AtomSerializer.new.unfavourite_salmon(favourite)
       expect(unfavourite_salmon.name).to eq 'entry'
     end
 
@@ -990,7 +990,7 @@ RSpec.describe AtomSerializer do
       favourite = Fabricate(:favourite)
 
       time_before = Time.now
-      unfavourite_salmon = AtomSerializer.new.unfavourite_salmon(favourite)
+      unfavourite_salmon = Ostatus::AtomSerializer.new.unfavourite_salmon(favourite)
       time_after = Time.now
 
       expect(unfavourite_salmon.id.text).to(
@@ -1003,7 +1003,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, domain: nil, username: 'username')
       favourite = Fabricate(:favourite, account: account)
 
-      unfavourite_salmon = AtomSerializer.new.unfavourite_salmon(favourite)
+      unfavourite_salmon = Ostatus::AtomSerializer.new.unfavourite_salmon(favourite)
 
       expect(unfavourite_salmon.author.id.text).to eq 'https://cb6e6126.ngrok.io/users/username'
     end
@@ -1011,7 +1011,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:object-type element with activity type' do
       favourite = Fabricate(:favourite)
 
-      unfavourite_salmon = AtomSerializer.new.unfavourite_salmon(favourite)
+      unfavourite_salmon = Ostatus::AtomSerializer.new.unfavourite_salmon(favourite)
 
       object_type = unfavourite_salmon.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq 'http://activitystrea.ms/schema/1.0/activity'
@@ -1020,7 +1020,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:verb element with favorite' do
       favourite = Fabricate(:favourite)
 
-      unfavourite_salmon = AtomSerializer.new.unfavourite_salmon(favourite)
+      unfavourite_salmon = Ostatus::AtomSerializer.new.unfavourite_salmon(favourite)
 
       verb = unfavourite_salmon.nodes.find { |node| node.name == 'activity:verb' }
       expect(verb.text).to eq TagManager::VERBS[:unfavorite]
@@ -1030,7 +1030,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate(:status, created_at: '2000-01-01T00:00:00Z')
       favourite = Fabricate(:favourite, status: status)
 
-      unfavourite_salmon = AtomSerializer.new.unfavourite_salmon(favourite)
+      unfavourite_salmon = Ostatus::AtomSerializer.new.unfavourite_salmon(favourite)
 
       object = unfavourite_salmon.nodes.find { |node| node.name == 'activity:object' }
       expect(object.id.text).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{status.id}:objectType=Status"
@@ -1041,7 +1041,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate(:status, account: status_account, created_at: '2000-01-01T00:00:00Z')
       favourite = Fabricate(:favourite, status: status)
 
-      unfavourite_salmon = AtomSerializer.new.unfavourite_salmon(favourite)
+      unfavourite_salmon = Ostatus::AtomSerializer.new.unfavourite_salmon(favourite)
 
       in_reply_to = unfavourite_salmon.nodes.find { |node| node.name == 'thr:in-reply-to' }
       expect(in_reply_to.ref).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{status.id}:objectType=Status"
@@ -1054,7 +1054,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate(:status, account: status_account)
       favourite = Fabricate(:favourite, account: account, status: status)
 
-      unfavourite_salmon = AtomSerializer.new.unfavourite_salmon(favourite)
+      unfavourite_salmon = Ostatus::AtomSerializer.new.unfavourite_salmon(favourite)
 
       expect(unfavourite_salmon.title.text).to eq 'account no longer favourites a status by status_account@remote'
       expect(unfavourite_salmon.content.text).to eq 'account no longer favourites a status by status_account@remote'
@@ -1062,8 +1062,8 @@ RSpec.describe AtomSerializer do
 
     it 'returns element whose rendered view triggers unfavourite when processed' do
       favourite = Fabricate(:favourite)
-      unfavourite_salmon = AtomSerializer.new.unfavourite_salmon(favourite)
-      xml = AtomSerializer.render(unfavourite_salmon)
+      unfavourite_salmon = Ostatus::AtomSerializer.new.unfavourite_salmon(favourite)
+      xml = Ostatus::AtomSerializer.render(unfavourite_salmon)
       envelope = OStatus2::Salmon.new.pack(xml, favourite.account.keypair)
 
       ProcessInteractionService.new.call(envelope, favourite.status.account)
@@ -1075,19 +1075,19 @@ RSpec.describe AtomSerializer do
     include_examples 'namespaces' do
       def serialize
         follow = Fabricate(:follow)
-        AtomSerializer.new.follow_salmon(follow)
+        Ostatus::AtomSerializer.new.follow_salmon(follow)
       end
     end
 
     it 'returns entry element' do
       follow = Fabricate(:follow)
-      follow_salmon = AtomSerializer.new.follow_salmon(follow)
+      follow_salmon = Ostatus::AtomSerializer.new.follow_salmon(follow)
       expect(follow_salmon.name).to eq 'entry'
     end
 
     it 'appends id element with unique tag' do
       follow = Fabricate(:follow, created_at: '2000-01-01T00:00:00Z')
-      follow_salmon = AtomSerializer.new.follow_salmon(follow)
+      follow_salmon = Ostatus::AtomSerializer.new.follow_salmon(follow)
       expect(follow_salmon.id.text).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{follow.id}:objectType=Follow"
     end
 
@@ -1095,7 +1095,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, domain: nil, username: 'username')
       follow = Fabricate(:follow, account: account)
 
-      follow_salmon = AtomSerializer.new.follow_salmon(follow)
+      follow_salmon = Ostatus::AtomSerializer.new.follow_salmon(follow)
 
       expect(follow_salmon.author.id.text).to eq 'https://cb6e6126.ngrok.io/users/username'
     end
@@ -1103,7 +1103,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:object-type element with activity type' do
       follow = Fabricate(:follow)
 
-      follow_salmon = AtomSerializer.new.follow_salmon(follow)
+      follow_salmon = Ostatus::AtomSerializer.new.follow_salmon(follow)
 
       object_type = follow_salmon.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq TagManager::TYPES[:activity]
@@ -1112,7 +1112,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:verb element with follow' do
       follow = Fabricate(:follow)
 
-      follow_salmon = AtomSerializer.new.follow_salmon(follow)
+      follow_salmon = Ostatus::AtomSerializer.new.follow_salmon(follow)
 
       verb = follow_salmon.nodes.find { |node| node.name == 'activity:verb' }
       expect(verb.text).to eq TagManager::VERBS[:follow]
@@ -1122,7 +1122,7 @@ RSpec.describe AtomSerializer do
       target_account = Fabricate(:account, domain: 'domain', uri: 'https://domain/id')
       follow = Fabricate(:follow, target_account: target_account)
 
-      follow_salmon = AtomSerializer.new.follow_salmon(follow)
+      follow_salmon = Ostatus::AtomSerializer.new.follow_salmon(follow)
 
       object = follow_salmon.nodes.find { |node| node.name == 'activity:object' }
       expect(object.id.text).to eq 'https://domain/id'
@@ -1133,7 +1133,7 @@ RSpec.describe AtomSerializer do
       target_account = Fabricate(:account, domain: 'remote', username: 'target_account')
       follow = Fabricate(:follow, account: account, target_account: target_account)
 
-      follow_salmon = AtomSerializer.new.follow_salmon(follow)
+      follow_salmon = Ostatus::AtomSerializer.new.follow_salmon(follow)
 
       expect(follow_salmon.title.text).to eq 'account started following target_account@remote'
       expect(follow_salmon.content.text).to eq 'account started following target_account@remote'
@@ -1141,8 +1141,8 @@ RSpec.describe AtomSerializer do
 
     it 'returns element whose rendered view triggers follow when processed' do
       follow = Fabricate(:follow)
-      follow_salmon = AtomSerializer.new.follow_salmon(follow)
-      xml = AtomSerializer.render(follow_salmon)
+      follow_salmon = Ostatus::AtomSerializer.new.follow_salmon(follow)
+      xml = Ostatus::AtomSerializer.render(follow_salmon)
       follow.destroy!
       envelope = OStatus2::Salmon.new.pack(xml, follow.account.keypair)
 
@@ -1157,7 +1157,7 @@ RSpec.describe AtomSerializer do
       def serialize
         follow = Fabricate(:follow)
         follow.destroy!
-        AtomSerializer.new.unfollow_salmon(follow)
+        Ostatus::AtomSerializer.new.unfollow_salmon(follow)
       end
     end
 
@@ -1165,7 +1165,7 @@ RSpec.describe AtomSerializer do
       follow = Fabricate(:follow)
       follow.destroy!
 
-      unfollow_salmon = AtomSerializer.new.unfollow_salmon(follow)
+      unfollow_salmon = Ostatus::AtomSerializer.new.unfollow_salmon(follow)
 
       expect(unfollow_salmon.name).to eq 'entry'
     end
@@ -1175,7 +1175,7 @@ RSpec.describe AtomSerializer do
       follow.destroy!
 
       time_before = Time.now
-      unfollow_salmon = AtomSerializer.new.unfollow_salmon(follow)
+      unfollow_salmon = Ostatus::AtomSerializer.new.unfollow_salmon(follow)
       time_after = Time.now
 
       expect(unfollow_salmon.id.text).to(
@@ -1190,7 +1190,7 @@ RSpec.describe AtomSerializer do
       follow = Fabricate(:follow, account: account, target_account: target_account)
       follow.destroy!
 
-      unfollow_salmon = AtomSerializer.new.unfollow_salmon(follow)
+      unfollow_salmon = Ostatus::AtomSerializer.new.unfollow_salmon(follow)
 
       expect(unfollow_salmon.title.text).to eq 'account is no longer following target_account@remote'
     end
@@ -1201,7 +1201,7 @@ RSpec.describe AtomSerializer do
       follow = Fabricate(:follow, account: account, target_account: target_account)
       follow.destroy!
 
-      unfollow_salmon = AtomSerializer.new.unfollow_salmon(follow)
+      unfollow_salmon = Ostatus::AtomSerializer.new.unfollow_salmon(follow)
 
       expect(unfollow_salmon.content.text).to eq 'account is no longer following target_account@remote'
     end
@@ -1211,7 +1211,7 @@ RSpec.describe AtomSerializer do
       follow = Fabricate(:follow, account: account)
       follow.destroy!
 
-      unfollow_salmon = AtomSerializer.new.unfollow_salmon(follow)
+      unfollow_salmon = Ostatus::AtomSerializer.new.unfollow_salmon(follow)
 
       expect(unfollow_salmon.author.id.text).to eq 'https://cb6e6126.ngrok.io/users/username'
     end
@@ -1220,7 +1220,7 @@ RSpec.describe AtomSerializer do
       follow = Fabricate(:follow)
       follow.destroy!
 
-      unfollow_salmon = AtomSerializer.new.unfollow_salmon(follow)
+      unfollow_salmon = Ostatus::AtomSerializer.new.unfollow_salmon(follow)
 
       object_type = unfollow_salmon.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq TagManager::TYPES[:activity]
@@ -1230,7 +1230,7 @@ RSpec.describe AtomSerializer do
       follow = Fabricate(:follow)
       follow.destroy!
 
-      unfollow_salmon = AtomSerializer.new.unfollow_salmon(follow)
+      unfollow_salmon = Ostatus::AtomSerializer.new.unfollow_salmon(follow)
 
       verb = unfollow_salmon.nodes.find { |node| node.name == 'activity:verb' }
       expect(verb.text).to eq TagManager::VERBS[:unfollow]
@@ -1241,7 +1241,7 @@ RSpec.describe AtomSerializer do
       follow = Fabricate(:follow, target_account: target_account)
       follow.destroy!
 
-      unfollow_salmon = AtomSerializer.new.unfollow_salmon(follow)
+      unfollow_salmon = Ostatus::AtomSerializer.new.unfollow_salmon(follow)
 
       object = unfollow_salmon.nodes.find { |node| node.name == 'activity:object' }
       expect(object.id.text).to eq 'https://domain/id'
@@ -1250,8 +1250,8 @@ RSpec.describe AtomSerializer do
     it 'returns element whose rendered view triggers unfollow when processed' do
       follow = Fabricate(:follow)
       follow.destroy!
-      unfollow_salmon = AtomSerializer.new.unfollow_salmon(follow)
-      xml = AtomSerializer.render(unfollow_salmon)
+      unfollow_salmon = Ostatus::AtomSerializer.new.unfollow_salmon(follow)
+      xml = Ostatus::AtomSerializer.render(unfollow_salmon)
       follow.account.follow!(follow.target_account)
       envelope = OStatus2::Salmon.new.pack(xml, follow.account.keypair)
 
@@ -1265,13 +1265,13 @@ RSpec.describe AtomSerializer do
     include_examples 'namespaces' do
       def serialize
         follow_request = Fabricate(:follow_request)
-        AtomSerializer.new.follow_request_salmon(follow_request)
+        Ostatus::AtomSerializer.new.follow_request_salmon(follow_request)
       end
     end
 
     context do
       def serialize(follow_request)
-        AtomSerializer.new.follow_request_salmon(follow_request)
+        Ostatus::AtomSerializer.new.follow_request_salmon(follow_request)
       end
 
       it_behaves_like 'follow request salmon'
@@ -1293,7 +1293,7 @@ RSpec.describe AtomSerializer do
       it 'returns element whose rendered view triggers follow request when processed' do
         follow_request = Fabricate(:follow_request)
         follow_request_salmon = serialize(follow_request)
-        xml = AtomSerializer.render(follow_request_salmon)
+        xml = Ostatus::AtomSerializer.render(follow_request_salmon)
         envelope = OStatus2::Salmon.new.pack(xml, follow_request.account.keypair)
         follow_request.destroy!
 
@@ -1308,13 +1308,13 @@ RSpec.describe AtomSerializer do
     include_examples 'namespaces' do
       def serialize
         follow_request = Fabricate(:follow_request)
-        AtomSerializer.new.authorize_follow_request_salmon(follow_request)
+        Ostatus::AtomSerializer.new.authorize_follow_request_salmon(follow_request)
       end
     end
 
     it_behaves_like 'follow request salmon' do
       def serialize(follow_request)
-        authorize_follow_request_salmon = AtomSerializer.new.authorize_follow_request_salmon(follow_request)
+        authorize_follow_request_salmon = Ostatus::AtomSerializer.new.authorize_follow_request_salmon(follow_request)
         authorize_follow_request_salmon.nodes.find { |node| node.name == 'activity:object' }
       end
     end
@@ -1323,7 +1323,7 @@ RSpec.describe AtomSerializer do
       follow_request = Fabricate(:follow_request)
 
       time_before = Time.now
-      authorize_follow_request_salmon = AtomSerializer.new.authorize_follow_request_salmon(follow_request)
+      authorize_follow_request_salmon = Ostatus::AtomSerializer.new.authorize_follow_request_salmon(follow_request)
       time_after = Time.now
 
       expect(authorize_follow_request_salmon.id.text).to(
@@ -1337,7 +1337,7 @@ RSpec.describe AtomSerializer do
       target_account = Fabricate(:account, domain: nil, username: 'target_account')
       follow_request = Fabricate(:follow_request, account: account, target_account: target_account)
 
-      authorize_follow_request_salmon = AtomSerializer.new.authorize_follow_request_salmon(follow_request)
+      authorize_follow_request_salmon = Ostatus::AtomSerializer.new.authorize_follow_request_salmon(follow_request)
 
       expect(authorize_follow_request_salmon.title.text).to eq 'target_account authorizes follow request by account@remote'
     end
@@ -1345,7 +1345,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:object-type element with activity type' do
       follow_request = Fabricate(:follow_request)
 
-      authorize_follow_request_salmon = AtomSerializer.new.authorize_follow_request_salmon(follow_request)
+      authorize_follow_request_salmon = Ostatus::AtomSerializer.new.authorize_follow_request_salmon(follow_request)
 
       object_type = authorize_follow_request_salmon.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq TagManager::TYPES[:activity]
@@ -1354,7 +1354,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:verb element with authorize' do
       follow_request = Fabricate(:follow_request)
 
-      authorize_follow_request_salmon = AtomSerializer.new.authorize_follow_request_salmon(follow_request)
+      authorize_follow_request_salmon = Ostatus::AtomSerializer.new.authorize_follow_request_salmon(follow_request)
 
       verb = authorize_follow_request_salmon.nodes.find { |node| node.name == 'activity:verb' }
       expect(verb.text).to eq TagManager::VERBS[:authorize]
@@ -1362,8 +1362,8 @@ RSpec.describe AtomSerializer do
 
     it 'returns element whose rendered view creates follow from follow request when processed' do
       follow_request = Fabricate(:follow_request)
-      authorize_follow_request_salmon = AtomSerializer.new.authorize_follow_request_salmon(follow_request)
-      xml = AtomSerializer.render(authorize_follow_request_salmon)
+      authorize_follow_request_salmon = Ostatus::AtomSerializer.new.authorize_follow_request_salmon(follow_request)
+      xml = Ostatus::AtomSerializer.render(authorize_follow_request_salmon)
       envelope = OStatus2::Salmon.new.pack(xml, follow_request.target_account.keypair)
 
       ProcessInteractionService.new.call(envelope, follow_request.account)
@@ -1377,13 +1377,13 @@ RSpec.describe AtomSerializer do
     include_examples 'namespaces' do
       def serialize
         follow_request = Fabricate(:follow_request)
-        AtomSerializer.new.reject_follow_request_salmon(follow_request)
+        Ostatus::AtomSerializer.new.reject_follow_request_salmon(follow_request)
       end
     end
 
     it_behaves_like 'follow request salmon' do
       def serialize(follow_request)
-        reject_follow_request_salmon = AtomSerializer.new.reject_follow_request_salmon(follow_request)
+        reject_follow_request_salmon = Ostatus::AtomSerializer.new.reject_follow_request_salmon(follow_request)
         reject_follow_request_salmon.nodes.find { |node| node.name == 'activity:object' }
       end
     end
@@ -1392,7 +1392,7 @@ RSpec.describe AtomSerializer do
       follow_request = Fabricate(:follow_request)
 
       time_before = Time.now
-      reject_follow_request_salmon = AtomSerializer.new.reject_follow_request_salmon(follow_request)
+      reject_follow_request_salmon = Ostatus::AtomSerializer.new.reject_follow_request_salmon(follow_request)
       time_after = Time.now
 
       expect(reject_follow_request_salmon.id.text).to(
@@ -1405,28 +1405,28 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, domain: 'remote', username: 'account')
       target_account = Fabricate(:account, domain: nil, username: 'target_account')
       follow_request = Fabricate(:follow_request, account: account, target_account: target_account)
-      reject_follow_request_salmon = AtomSerializer.new.reject_follow_request_salmon(follow_request)
+      reject_follow_request_salmon = Ostatus::AtomSerializer.new.reject_follow_request_salmon(follow_request)
       expect(reject_follow_request_salmon.title.text).to eq 'target_account rejects follow request by account@remote'
     end
 
     it 'appends activity:object-type element with activity type' do
       follow_request = Fabricate(:follow_request)
-      reject_follow_request_salmon = AtomSerializer.new.reject_follow_request_salmon(follow_request)
+      reject_follow_request_salmon = Ostatus::AtomSerializer.new.reject_follow_request_salmon(follow_request)
       object_type = reject_follow_request_salmon.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq TagManager::TYPES[:activity]
     end
 
     it 'appends activity:verb element with authorize' do
       follow_request = Fabricate(:follow_request)
-      reject_follow_request_salmon = AtomSerializer.new.reject_follow_request_salmon(follow_request)
+      reject_follow_request_salmon = Ostatus::AtomSerializer.new.reject_follow_request_salmon(follow_request)
       verb = reject_follow_request_salmon.nodes.find { |node| node.name == 'activity:verb' }
       expect(verb.text).to eq TagManager::VERBS[:reject]
     end
 
     it 'returns element whose rendered view deletes follow request when processed' do
       follow_request = Fabricate(:follow_request)
-      reject_follow_request_salmon = AtomSerializer.new.reject_follow_request_salmon(follow_request)
-      xml = AtomSerializer.render(reject_follow_request_salmon)
+      reject_follow_request_salmon = Ostatus::AtomSerializer.new.reject_follow_request_salmon(follow_request)
+      xml = Ostatus::AtomSerializer.render(reject_follow_request_salmon)
       envelope = OStatus2::Salmon.new.pack(xml, follow_request.target_account.keypair)
 
       ProcessInteractionService.new.call(envelope, follow_request.account)
@@ -1439,31 +1439,31 @@ RSpec.describe AtomSerializer do
   describe '#object' do
     include_examples 'status attributes' do
       def serialize(status)
-        AtomSerializer.new.object(status)
+        Ostatus::AtomSerializer.new.object(status)
       end
     end
 
     it 'returns activity:object element' do
       status = Fabricate(:status)
-      object = AtomSerializer.new.object(status)
+      object = Ostatus::AtomSerializer.new.object(status)
       expect(object.name).to eq 'activity:object'
     end
 
     it 'appends id element with URL for status' do
       status = Fabricate(:status, created_at: '2000-01-01T00:00:00Z')
-      object = AtomSerializer.new.object(status)
+      object = Ostatus::AtomSerializer.new.object(status)
       expect(object.id.text).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{status.id}:objectType=Status"
     end
 
     it 'appends published element with created date' do
       status = Fabricate(:status, created_at: '2000-01-01T00:00:00Z')
-      object = AtomSerializer.new.object(status)
+      object = Ostatus::AtomSerializer.new.object(status)
       expect(object.published.text).to eq '2000-01-01T00:00:00Z'
     end
 
     it 'appends updated element with updated date' do
       status = Fabricate(:status, updated_at: '2000-01-01T00:00:00Z')
-      object = AtomSerializer.new.object(status)
+      object = Ostatus::AtomSerializer.new.object(status)
       expect(object.updated.text).to eq '2000-01-01T00:00:00Z'
     end
 
@@ -1471,7 +1471,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, username: 'username')
       status = Fabricate(:status, account: account)
 
-      object = AtomSerializer.new.object(status)
+      object = Ostatus::AtomSerializer.new.object(status)
 
       expect(object.title.text).to eq 'New status by username'
     end
@@ -1480,7 +1480,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, username: 'username')
       status = Fabricate(:status, account: account)
 
-      entry = AtomSerializer.new.object(status)
+      entry = Ostatus::AtomSerializer.new.object(status)
 
       expect(entry.author.id.text).to eq 'https://cb6e6126.ngrok.io/users/username'
     end
@@ -1488,7 +1488,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:object-type element with object type' do
       status = Fabricate(:status)
 
-      entry = AtomSerializer.new.object(status)
+      entry = Ostatus::AtomSerializer.new.object(status)
 
       object_type = entry.nodes.find { |node| node.name == 'activity:object-type' }
       expect(object_type.text).to eq TagManager::TYPES[:note]
@@ -1497,7 +1497,7 @@ RSpec.describe AtomSerializer do
     it 'appends activity:verb element with verb' do
       status = Fabricate(:status)
 
-      entry = AtomSerializer.new.object(status)
+      entry = Ostatus::AtomSerializer.new.object(status)
 
       object_type = entry.nodes.find { |node| node.name == 'activity:verb' }
       expect(object_type.text).to eq TagManager::VERBS[:post]
@@ -1507,7 +1507,7 @@ RSpec.describe AtomSerializer do
       account = Fabricate(:account, username: 'username')
       status = Fabricate(:status, account: account)
 
-      entry = AtomSerializer.new.object(status)
+      entry = Ostatus::AtomSerializer.new.object(status)
 
       link = entry.nodes.find { |node| node.name == 'link' && node[:rel] == 'alternate' }
       expect(link[:type]).to eq 'text/html'
@@ -1519,7 +1519,7 @@ RSpec.describe AtomSerializer do
       thread = Fabricate(:status, account: account, created_at: '2000-01-01T00:00:00Z')
       reply = Fabricate(:status, thread: thread)
 
-      entry = AtomSerializer.new.object(reply)
+      entry = Ostatus::AtomSerializer.new.object(reply)
 
       in_reply_to = entry.nodes.find { |node| node.name == 'thr:in-reply-to' }
       expect(in_reply_to.ref).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{thread.id}:objectType=Status"
@@ -1528,7 +1528,7 @@ RSpec.describe AtomSerializer do
 
     it 'does not append thr:in-reply-to element if thread is nil' do
       status = Fabricate(:status, thread: nil)
-      entry = AtomSerializer.new.object(status)
+      entry = Ostatus::AtomSerializer.new.object(status)
       entry.nodes.each { |node| expect(node.name).not_to eq 'thr:in-reply-to' }
     end
 
@@ -1536,7 +1536,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate.build(:status, conversation_id: nil)
       status.save!(validate: false)
 
-      entry = AtomSerializer.new.object(status)
+      entry = Ostatus::AtomSerializer.new.object(status)
 
       entry.nodes.each { |node| expect(node.name).not_to eq 'ostatus:conversation' }
     end
@@ -1545,7 +1545,7 @@ RSpec.describe AtomSerializer do
       status = Fabricate(:status)
       status.conversation.update!(created_at: '2000-01-01T00:00:00Z')
 
-      entry = AtomSerializer.new.object(status)
+      entry = Ostatus::AtomSerializer.new.object(status)
 
       conversation = entry.nodes.find { |node| node.name == 'ostatus:conversation' }
       expect(conversation[:ref]).to eq "tag:cb6e6126.ngrok.io,2000-01-01:objectId=#{status.conversation.id}:objectType=Conversation"