From 1d2bcc1332cdc501e2ec92f6755869d4a0804bb2 Mon Sep 17 00:00:00 2001
From: Kevin Deldycke <kevin@deldycke.com>
Date: Tue, 26 Apr 2011 12:46:35 +0200
Subject: [PATCH] Some replies are attached to a nonexistent parent. In this
 case, promote them as Topics.

---
 e107-importer.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/e107-importer.php b/e107-importer.php
index ebf015d..1cbae41 100644
--- a/e107-importer.php
+++ b/e107-importer.php
@@ -1091,10 +1091,11 @@ function import_forum_thread($thread) {
 
     // Top message of threads are topics, attached to a forum.
     // Others are replies, attached to a topic.
-    if ($thread_parent > 0) {
+    if ($thread_parent > 0 and array_key_exists($thread_parent, $this->forum_post_mapping)) {
       $post_type_id = bbp_get_reply_post_type();
       $thread_parent_id = (int) $this->forum_post_mapping[$thread_parent];
     } else {
+      $thread_parent = 0; // Reply attached to a nonexistent parent are promoted to topic.
       $post_type_id = bbp_get_topic_post_type();
       $thread_parent_id = $this->forum_mapping[$thread_forum_id];
     }