By gábor hojtsy on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
8.x
Introduced in version: 
8.0
Issue links: 
https://www.drupal.org/node/1754208
Description: 

As part of streamlining the APIs and unifying argument use, hook_mail() and hook_mail_alter() now converted as well to use $langcode instead of full language objects.

Drupal 7:

drupal_mail('contact', 'page_mail', $to, language_default(), $values, $from);

function user_mail($key, &$message, $params) {
  $language = $message['language'];
  $variables = array('user' => $params['account']);
  $message['subject'] .= _user_mail_text($key . '_subject', $language, $variables);
  $message['body'][] = _user_mail_text($key . '_body', $language, $variables);
}

Drupal 8:

drupal_mail('contact', 'page_mail', $to, language_default()->langcode, $values, $from);

function user_mail($key, &$message, $params) {
  $langcode = $message['langcode'];
  $variables = array('user' => $params['account']);
  $message['subject'] .= _user_mail_text($key . '.subject', $langcode, $variables);
  $message['body'][] = _user_mail_text($key . '.body', $langcode, $variables);
}

(The other _user_mail_text() changes were due to configuration handling changes).

Related change to user_preferred_language(): http://drupal.org/node/1783392

Impacts: 
Module developers