[11.x] Allow view content dependent mail callbacks (#51990)

* Allow view content dependent mail callbacks

* Update Mailer.php

---------

Co-authored-by: Max Tingle <[email protected]>
Co-authored-by: Taylor Otwell <[email protected]>

src/Illuminate/Mail/Mailer.php

@@ -303,22 +303,19 @@ public function send($view, array $data = [], $callback = null)
 
         $data['mailer'] = $this->name;
 
-        // First we need to parse the view, which could either be a string or an array
-        // containing both an HTML and plain text versions of the view which should
-        // be used when sending an e-mail. We will extract both of them out here.
+        // Once we have retrieved the view content for the e-mail we will set the body
+        // of this message using the HTML type, which will provide a simple wrapper
+        // to creating view based emails that are able to receive arrays of data.
         [$view, $plain, $raw] = $this->parseView($view);
 
         $data['message'] = $message = $this->createMessage();
 
-        // Once we have retrieved the view content for the e-mail we will set the body
-        // of this message using the HTML type, which will provide a simple wrapper
-        // to creating view based emails that are able to receive arrays of data.
+        $this->addContent($message, $view, $plain, $raw, $data);
+
         if (! is_null($callback)) {
             $callback($message);
         }
 
-        $this->addContent($message, $view, $plain, $raw, $data);
-
         // If a global "to" address has been set, we will set that address on the mail
         // message. This is primarily useful during local development in which each
         // message should be delivered into a single mail address for inspection.