FIX: unicode titles missing when visiting topic from topic list

app/assets/javascripts/discourse/routes/topic.js.es6

@@ -20,7 +20,7 @@ const TopicRoute = Discourse.Route.extend({
   titleToken() {
     const model = this.modelFor('topic');
     if (model) {
-      const result = model.get('unicode_title') ? model.get('unicode_title') : model.get('title'),
+      const result = model.get('unicode_title') || model.get('title'),
             cat = model.get('category');
 
       // Only display uncategorized in the title tag if it was renamed

app/serializers/listable_topic_serializer.rb

@@ -22,10 +22,19 @@ class ListableTopicSerializer < BasicTopicSerializer
              :is_warning,
              :notification_level,
              :bookmarked,
-             :liked
+             :liked,
+             :unicode_title
 
   has_one :last_poster, serializer: BasicUserSerializer, embed: :objects
 
+  def include_unicode_title?
+    object.title.match?(/:[\w\-+]+:/)
+  end
+
+  def unicode_title
+    Emoji.gsub_emoji_to_unicode(object.title)
+  end
+
   def highest_post_number
     (scope.is_staff? && object.highest_staff_post_number) || object.highest_post_number
   end

app/serializers/topic_view_serializer.rb

@@ -267,7 +267,7 @@ class TopicViewSerializer < ApplicationSerializer
   end
 
   def include_unicode_title?
-    !!(object.topic.title =~ /:([\w\-+]*):/)
+    object.topic.title.match?(/:[\w\-+]+:/)
   end
 
   def unicode_title

lib/freedom_patches/match.rb

@@ -0,0 +1,8 @@
+class String
+  # new to Ruby 2.4, fastest way of matching a string to a regex
+  unless method_defined? :match?
+    def match?(regex)
+      !!(self =~ regex)
+    end
+  end
+end

lib/freedom_patches/scrub.rb

@@ -1,16 +0,0 @@
-class String
-  # A poor man's scrub, Ruby 2.1 has a much better implementation, but this will do
-  unless method_defined? :scrub
-    def scrub(replace_char = nil)
-      str = dup.force_encoding("utf-8")
-
-      unless str.valid_encoding?
-        # work around bust string with a double conversion
-        str.encode!("utf-16", "utf-8", invalid: :replace)
-        str.encode!("utf-8", "utf-16")
-      end
-
-      str
-    end
-  end
-end