Merge remote-tracking branch 'origin/master' into gs-master

Conflicts:
 	.travis.yml
 	Gemfile.lock
 	README.md
 	app/controllers/settings/follower_domains_controller.rb
 	app/controllers/statuses_controller.rb
 	app/javascript/mastodon/locales/ja.json
 	app/lib/feed_manager.rb
 	app/models/media_attachment.rb
 	app/models/mute.rb
 	app/models/status.rb
 	app/services/mute_service.rb
 	app/views/home/index.html.haml
 	app/views/stream_entries/_simple_status.html.haml
 	config/locales/ca.yml
 	config/locales/en.yml
 	config/locales/es.yml
 	config/locales/fr.yml
 	config/locales/nl.yml
 	config/locales/pl.yml
 	config/locales/pt-BR.yml
 	config/themes.yml

app/policies/status_policy.rb

@@ -1,6 +1,12 @@
 # frozen_string_literal: true
 
 class StatusPolicy < ApplicationPolicy
+  def initialize(current_account, record, preloaded_relations = {})
+    super(current_account, record)
+
+    @preloaded_relations = preloaded_relations
+  end
+
   def index?
     staff?
   end
@@ -9,16 +15,20 @@ class StatusPolicy < ApplicationPolicy
     return false if local_only? && current_account.nil?
 
     if direct?
-      owned? || record.mentions.where(account: current_account).exists?
+      owned? || mention_exists?
     elsif private?
-      owned? || current_account&.following?(author) || record.mentions.where(account: current_account).exists?
+      owned? || following_author? || mention_exists?
     else
-      current_account.nil? || !author.blocking?(current_account)
+      current_account.nil? || !author_blocking?
     end
   end
 
   def reblog?
-    !direct? && (!private? || owned?) && show?
+    !direct? && (!private? || owned?) && show? && !blocking_author?
+  end
+
+  def favourite?
+    show? && !blocking_author?
   end
 
   def destroy?
@@ -45,6 +55,34 @@ class StatusPolicy < ApplicationPolicy
     record.private_visibility?
   end
 
+  def mention_exists?
+    return false if current_account.nil?
+
+    if record.mentions.loaded?
+      record.mentions.any? { |mention| mention.account_id == current_account.id }
+    else
+      record.mentions.where(account: current_account).exists?
+    end
+  end
+
+  def blocking_author?
+    return false if current_account.nil?
+
+    @preloaded_relations[:blocking] ? @preloaded_relations[:blocking][author.id] : current_account.blocking?(author)
+  end
+
+  def author_blocking?
+    return false if current_account.nil?
+
+    @preloaded_relations[:blocked_by] ? @preloaded_relations[:blocked_by][author.id] : author.blocking?(current_account)
+  end
+
+  def following_author?
+    return false if current_account.nil?
+
+    @preloaded_relations[:following] ? @preloaded_relations[:following][author.id] : current_account.following?(author)
+  end
+
   def author
     record.account
   end