Question

The Swiftmailer docs says you can create your own class to handle replacements using the Decorator plugin:

class DbReplacements implements Swift_Plugins_Decorator_Replacements {
  public function getReplacementsFor($address) {
    $sql = sprintf(
      "SELECT * FROM user WHERE email = '%s'",
      mysql_real_escape_string($address)
    );

    $result = mysql_query($sql);

    if ($row = mysql_fetch_assoc($result)) {
      return array(
        '{username}'=>$row['username'],
        '{password}'=>$row['password']
      );
    }
  }
}

But in my case my database contains duplicated email address, i.e. the same address can appear on 3-4 accounts, so I need to get the replacements based on the user id instead.

How do I modify the above class to match my criteria?

Answer 1

Since swiftmailer don’t know anything about id, you have to translate email to id by yourself. For example add new property to DbReplacements holding an associative array 'email' => 'id' (of course firstly limited to known ID, ie. SELECT email, id FROM user WHERE id IN(1,3,6,77) ) and in getReplacementsFor simply use email as index in this array to get user id.

Code sample to make it more clear:

class DbReplacements implements Swift_Plugins_Decorator_Replacements {
  public $email2id = array();
  public function getReplacementsFor($address) {
    $sql = sprintf(
      "SELECT * FROM user WHERE id = %d", $this->email2id[$address]
    );

    $result = mysql_query($sql);

    if ($row = mysql_fetch_assoc($result)) {
      return array(
        '{username}'=>$row['username'],
        '{password}'=>$row['password']
      );
    }
  }
}

$dbReplacer = new DbReplacements();
$decorator = new Swift_Plugins_DecoratorPlugin($dbReplacer); 
$mailer->registerPlugin($decorator);

$users = array(
    array('email'=>'[e-mail]', 'id' => 16),
    array('email'=>'[e-mail]', 'id' => 13),
);

foreach ($users as $user) {
  $message->addTo($user['email']);
  $dbReplacer->email2id[$user['email']] = $user['id'];
}