From 4a75da4fa9faaac9aea36fe4f9d7c775a12d5724 Mon Sep 17 00:00:00 2001
From: Sam <sam.saffron@gmail.com>
Date: Tue, 11 Aug 2015 15:46:21 +1000
Subject: [PATCH] Extensibility: allow validation of topics to be extended

Add before_create_topic and after_validate_topic extensibility points
---
 lib/topic_creator.rb | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/topic_creator.rb b/lib/topic_creator.rb
index 413144431..cff51e7c8 100644
--- a/lib/topic_creator.rb
+++ b/lib/topic_creator.rb
@@ -1,6 +1,9 @@
 require_dependency 'has_errors'
 
 class TopicCreator
+
+  attr_reader :user, :guardian, :opts
+
   include HasErrors
 
   def self.create(user, guardian, opts)
@@ -16,11 +19,21 @@ class TopicCreator
 
   def valid?
     topic = Topic.new(setup_topic_params)
-    validate_child(topic)
+    # validate? will clear the error hash
+    # so we fire the validation event after
+    # this allows us to add errors
+    valid = topic.valid?
+    DiscourseEvent.trigger(:after_validate_topic, topic, self)
+    valid &&= topic.errors.empty?
+
+    add_errors_from(topic) unless valid
+
+    valid
   end
 
   def create
     topic = Topic.new(setup_topic_params)
+    DiscourseEvent.trigger(:before_create_topic, topic, self)
 
     setup_auto_close_time(topic)
     process_private_message(topic)