FEATURE: Merge tagging plugin into core

lib/guardian.rb

@@ -276,6 +276,18 @@ class Guardian
     UserExport.where(user_id: @user.id, created_at: (Time.zone.now.beginning_of_day..Time.zone.now.end_of_day)).count == 0
   end
 
+  def can_create_tag?
+    user && user.has_trust_level?(SiteSetting.min_trust_to_create_tag.to_i)
+  end
+
+  def can_tag_topics?
+    user && user.has_trust_level?(SiteSetting.min_trust_level_to_tag_topics.to_i)
+  end
+
+  def can_admin_tags?
+    is_staff?
+  end
+
   private
 
   def is_my_own?(obj)