FIX: skip pm view action log while generating webhook payload.

Currently, while generating webhook payloads for a topic it's accidentally adding a personal message view log in 'system' user's history.

lib/post_destroyer.rb

@@ -57,10 +57,11 @@ class PostDestroyer
     payload = WebHook.generate_payload(:post, @post) if WebHook.active_web_hooks(:post).exists?
     topic = @post.topic
     is_first_post = @post.is_first_post? && topic
+    has_topic_web_hooks = is_first_post && WebHook.active_web_hooks(:topic).exists?
 
-    if is_first_post
-      topic_view = TopicView.new(topic.id, Discourse.system_user)
-      topic_payload = WebHook.generate_payload(:topic, topic_view, WebHookTopicViewSerializer) if WebHook.active_web_hooks(:topic).exists?
+    if has_topic_web_hooks
+      topic_view = TopicView.new(topic.id, Discourse.system_user, skip_staff_action: true)
+      topic_payload = WebHook.generate_payload(:topic, topic_view, WebHookTopicViewSerializer)
     end
 
     delete_removed_posts_after = @opts[:delete_removed_posts_after] || SiteSetting.delete_removed_posts_after
@@ -80,7 +81,7 @@ class PostDestroyer
       UserProfile.remove_featured_topic_from_all_profiles(@topic)
       UserActionManager.topic_destroyed(topic)
       DiscourseEvent.trigger(:topic_destroyed, topic, @user)
-      WebHook.enqueue_topic_hooks(:topic_destroyed, topic, topic_payload)
+      WebHook.enqueue_topic_hooks(:topic_destroyed, topic, topic_payload) if has_topic_web_hooks
     end
   end
 

lib/topic_view.rb

@@ -56,7 +56,7 @@ class TopicView
     @user = user
     @guardian = Guardian.new(@user)
 
-    check_and_raise_exceptions
+    check_and_raise_exceptions(options[:skip_staff_action])
 
     @message_bus_last_id = MessageBus.last_id("/topic/#{@topic.id}")
     @print = options[:print].present?
@@ -783,7 +783,7 @@ class TopicView
 
   end
 
-  def check_and_raise_exceptions
+  def check_and_raise_exceptions(skip_staff_action)
     raise Discourse::NotFound if @topic.blank?
     # Special case: If the topic is private and the user isn't logged in, ask them
     # to log in!
@@ -793,7 +793,7 @@ class TopicView
     # can user see this topic?
     raise Discourse::InvalidAccess.new("can't see #{@topic}", @topic) unless @guardian.can_see?(@topic)
     # log personal message views
-    if SiteSetting.log_personal_messages_views && @topic.present? && @topic.private_message? && @topic.all_allowed_users.where(id: @user.id).blank?
+    if SiteSetting.log_personal_messages_views && !skip_staff_action && @topic.present? && @topic.private_message? && @topic.all_allowed_users.where(id: @user.id).blank?
       unless UserHistory.where(acting_user_id: @user.id, action: UserHistory.actions[:check_personal_message], topic_id: @topic.id).where("created_at > ?", 1.hour.ago).exists?
         StaffActionLogger.new(@user).log_check_personal_message(@topic)
       end

spec/components/post_destroyer_spec.rb

@@ -611,6 +611,13 @@ describe PostDestroyer do
       expect(events[1][:event_name]).to eq(:topic_destroyed)
       expect(events[1][:params].first).to eq(first_post.topic)
     end
+
+    it 'should not log a personal message view' do
+      SiteSetting.log_personal_messages_views = true
+      Fabricate(:topic_web_hook)
+      StaffActionLogger.any_instance.expects(:log_check_personal_message).never
+      PostDestroyer.new(admin, first_post).destroy
+    end
   end
 
   context 'deleting the second post in a topic' do