Improve ActivityPub representations (#3844)

* Improve webfinger templates and make tests more flexible

* Clean up AS2 representation of actor

* Refactor outbox

* Create activities representation

* Add representations of followers/following collections, do not redirect /users/:username route if format is empty

* Remove unused translations

* ActivityPub endpoint for single statuses, add ActivityPub::TagManager for better
URL/URI generation

* Add ActivityPub::TagManager#to

* Represent all attachments as Document instead of Image/Video specifically
(Because for remote ones we may not know for sure)

Add mentions and hashtags representation to AP notes

* Add AP-resolvable hashtag URIs

* Use ActiveModelSerializers for ActivityPub

* Clean up unused translations

* Separate route for object and activity

* Adjust cc/to matrices

* Add to/cc to activities, ensure announce activity embeds target status and
not the wrapper status, add "id" to all collections

1 files changed, 2 insertions, 0 deletions

diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index a7b1ef690..26275d092 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -14,4 +14,6 @@ ActiveSupport::Inflector.inflections(:en) do |inflect|
   inflect.acronym 'StatsD'
   inflect.acronym 'OEmbed'
   inflect.acronym 'ActivityPub'
+  inflect.acronym 'PubSubHubbub'
+  inflect.acronym 'ActivityStreams'
 end