Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
	app/views/layouts/application.html.haml

Edited:
        app/helpers/application_helper.rb
        app/views/admin/domain_blocks/new.html.haml

Conflict wasn't really one, just two changes too close to one another.
Edition was to adapt the class names for themes to class names for
skins and flavours.

Also edited app/views/admin/domain_blocks/new.html.haml to strip the
duplicate admin pack inclusion thing.

app/lib/activitypub/activity.rb

@@ -104,7 +104,9 @@ class ActivityPub::Activity
 
   def crawl_links(status)
     return if status.spoiler_text?
-    LinkCrawlWorker.perform_async(status.id)
+
+    # Spread out crawling randomly to avoid DDoSing the link
+    LinkCrawlWorker.perform_in(rand(1..59).seconds, status.id)
   end
 
   def distribute_to_followers(status)

app/lib/activitypub/activity/create.rb

@@ -48,7 +48,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
       account: @account,
       text: text_from_content || '',
       language: detected_language,
-      spoiler_text: @object['summary'] || '',
+      spoiler_text: text_from_summary || '',
       created_at: @object['published'],
       override_timestamps: @options[:override_timestamps],
       reply: @object['inReplyTo'].present?,
@@ -193,6 +193,14 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     end
   end
 
+  def text_from_summary
+    if @object['summary'].present?
+      @object['summary']
+    elsif summary_language_map?
+      @object['summaryMap'].values.first
+    end
+  end
+
   def text_from_name
     if @object['name'].present?
       @object['name']
@@ -206,6 +214,8 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
       @object['contentMap'].keys.first
     elsif name_language_map?
       @object['nameMap'].keys.first
+    elsif summary_language_map?
+      @object['summaryMap'].keys.first
     elsif supported_object_type?
       LanguageDetector.instance.detect(text_from_content, @account)
     end
@@ -223,6 +233,10 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     end
   end
 
+  def summary_language_map?
+    @object['summaryMap'].is_a?(Hash) && !@object['summaryMap'].empty?
+  end
+
   def content_language_map?
     @object['contentMap'].is_a?(Hash) && !@object['contentMap'].empty?
   end