Issue #3263447 by AdamPS: Extend hook_mailer_bc_alter() to allow altering 'to' and 'reply-to'

modules/symfony_mailer_bc/src/MailManagerReplacement.php

@@ -54,7 +54,7 @@ class MailManagerReplacement extends MailManager {
    */
   public function mail($module, $key, $to, $langcode, $params = [], $reply = NULL, $send = TRUE) {
     // Call alter hook.
-    $context = ['module' => $module, 'entity' => NULL];
+    $context = ['module' => $module, 'to' => $to, 'reply' => $reply, 'entity' => NULL];
     $this->moduleHandler->alter(['mailer_bc', "mailer_bc_$module"], $key, $params, $context);
 
     if ($entity = $context['entity']) {
@@ -64,10 +64,10 @@ class MailManagerReplacement extends MailManager {
       $email = $this->emailFactory->newModuleEmail($module, $key);
     }
 
-    $email->setTo($to)
+    $email->setTo($context['to'])
       ->setLangcode($langcode)
       ->setParams($params);
-    if ($reply) {
+    if ($context['reply']) {
       $email->setReplyTo($reply);
     }
 

modules/symfony_mailer_bc/symfony_mailer_bc.api.php

@@ -16,8 +16,10 @@
  * @param array $params
  *   The email parameters.
  * @param array $context
- *   Array with two entries
+ *   Array with entries:
  *   - module: The email type, known as 'module' on the old interface.
+ *   - to: The email 'to' address.
+ *   - reply: The email 'reply-to' address.
  *   - entity: The associated config entity, always null on the old interface.
  *
  * @see \Drupal\Core\Mail\MailManagerInterface::mail()
@@ -34,8 +36,10 @@ function hook_mailer_bc_alter(string &$key, array &$params, array &$context) {
  * @param array $params
  *   The email parameters.
  * @param array $context
- *   Array with two entries
+ *   Array with entries:
  *   - module: The email type, known as 'module' on the old interface.
+ *   - to: The email 'to' address.
+ *   - reply: The email 'reply-to' address.
  *   - entity: The associated config entity, always null on the old interface.
  */
 function hook_mailer_bc_MODULE_alter(string &$key, array &$params, array &$context) {