Add polls (#10111)

* Add polls

Fix #1629

* Add tests

* Fixes

* Change API for creating polls

* Use name instead of content for votes

* Remove poll validation for remote polls

* Add polls to public pages

* When updating the poll, update options just in case they were changed

* Fix public pages showing both poll and other media

2 files changed, 38 insertions, 2 deletions

diff --git a/app/lib/activitypub/activity.rb b/app/lib/activitypub/activity.rb
index 11fa3363a..54b175613 100644
--- a/app/lib/activitypub/activity.rb
+++ b/app/lib/activitypub/activity.rb
@@ -4,7 +4,7 @@ class ActivityPub::Activity
   include JsonLdHelper
   include Redisable
 
-  SUPPORTED_TYPES = %w(Note).freeze
+  SUPPORTED_TYPES = %w(Note Question).freeze
   CONVERTED_TYPES = %w(Image Video Article Page).freeze
 
   def initialize(json, account, **options)
diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index 0980f94ba..793e20dbe 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -6,7 +6,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
 
     RedisLock.acquire(lock_options) do |lock|
       if lock.acquired?
-        return if delete_arrived_first?(object_uri)
+        return if delete_arrived_first?(object_uri) || poll_vote?
 
         @status = find_existing_status
 
@@ -68,6 +68,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
         thread: replied_to_status,
         conversation: conversation_from_uri(@object['conversation']),
         media_attachment_ids: process_attachments.take(4).map(&:id),
+        owned_poll: process_poll,
       }
     end
   end
@@ -209,6 +210,41 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     media_attachments
   end
 
+  def process_poll
+    return unless @object['type'] == 'Question' && (@object['anyOf'].is_a?(Array) || @object['oneOf'].is_a?(Array))
+
+    expires_at = begin
+      if @object['closed'].is_a?(String)
+        @object['closed']
+      elsif !@object['closed'].is_a?(FalseClass)
+        Time.now.utc
+      else
+        @object['endTime']
+      end
+    end
+
+    if @object['anyOf'].is_a?(Array)
+      multiple = true
+      items    = @object['anyOf']
+    else
+      multiple = false
+      items    = @object['oneOf']
+    end
+
+    Poll.new(
+      account: @account,
+      multiple: multiple,
+      expires_at: expires_at,
+      options: items.map { |item| item['name'].presence || item['content'] },
+      cached_tallies: items.map { |item| item.dig('replies', 'totalItems') || 0 }
+    )
+  end
+
+  def poll_vote?
+    return false if replied_to_status.nil? || replied_to_status.poll.nil? || !replied_to_status.local? || !replied_to_status.poll.options.include?(@object['name'])
+    replied_to_status.poll.votes.create!(account: @account, choice: replied_to_status.poll.options.index(@object['name']))
+  end
+
   def resolve_thread(status)
     return unless status.reply? && status.thread.nil? && Request.valid_url?(in_reply_to_uri)
     ThreadResolveWorker.perform_async(status.id, in_reply_to_uri)