#545956 by claudiu.cristea: Add a presave hook to comments.

modules/comment/comment.api.php

@@ -11,6 +11,19 @@
  * @{
  */
 
+/**
+ * The comment passed validation and is about to be saved.
+ *
+ * Modules may make changes to the comment before it is saved to the database.
+ *
+ * @param $comment
+ *   The comment object.
+ */
+function hook_comment_presave($comment) {
+  // Remove leading & trailing spaces from the comment subject.
+  $comment->subject = trim($comment->subject);
+}
+
 /**
  * The comment is being inserted.
  *

modules/comment/comment.module

@@ -1237,6 +1237,9 @@ function comment_save($comment) {
 
   field_attach_presave('comment', $comment);
 
+  // Allow modules to alter the comment before saving.
+  module_invoke_all('comment_presave', $comment);
+
   if ($comment->cid) {
     // Update the comment in the database.
     db_update('comment')