Prevent errors when saving non-forum nodes.

Author: jenlampton

www/modules/custom/borg_flag_notify/borg_flag_notify.module

@@ -203,31 +203,33 @@ function borg_flag_notify_comment_insert($comment) {
  * Implements hook_node_insert().
  */
 function borg_flag_notify_node_insert($node) {
-  $config = config('node_notify.settings');
-  // Find users who have flagged this category.
-  $users = flag_get_entity_flags('taxonomy_term', $node->field_forums[$node->langcode][0]['tid'], 'follow_category');
-  // Subscribe them to the node.
-  foreach ($users as $uid => $data) {
-    if ($uid != $node->uid) {
-      node_notify_subscribe($node->nid, $uid);
-
-      // Let the user know. We cant use Node Notify APIs because this is a new
-      // node, not a comment.
-      $user = user_load($uid);
-      $mail = $user->mail;
-      $language = user_preferred_language($user);
-
-      $message = backdrop_mail('borg_flag_notify', 'node_notification', $mail, $language, array(
-        'subject' => token_replace($config->get('topic_notify_template_subject'), array(
-          'node' => $node,
-        )),
-        'body' => filter_xss_admin(token_replace($config->get('topic_notify_template_body'), array(
-          'node' => $node,
-          'user' => $user,
-        ), array(
-          'sanitize' => FALSE,
-        ))),
-      ));
+  if ($node->type == 'forum_topic') {
+    $config = config('node_notify.settings');
+    // Find users who have flagged this category.
+    $users = flag_get_entity_flags('taxonomy_term', $node->field_forums[$node->langcode][0]['tid'], 'follow_category');
+    // Subscribe them to the node.
+    foreach ($users as $uid => $data) {
+      if ($uid != $node->uid) {
+        node_notify_subscribe($node->nid, $uid);
+
+        // Let the user know. We cant use Node Notify APIs because this is a new
+        // node, not a comment.
+        $user = user_load($uid);
+        $mail = $user->mail;
+        $language = user_preferred_language($user);
+
+        $message = backdrop_mail('borg_flag_notify', 'node_notification', $mail, $language, array(
+          'subject' => token_replace($config->get('topic_notify_template_subject'), array(
+            'node' => $node,
+          )),
+          'body' => filter_xss_admin(token_replace($config->get('topic_notify_template_body'), array(
+            'node' => $node,
+            'user' => $user,
+          ), array(
+            'sanitize' => FALSE,
+          ))),
+        ));
+      }
     }
   }
 }