/**
* Transforms a list of usernames into an array of UserInterface instances.
*
* @param string $value Usernames list
*
* @return UserInterface[] the corresponding UserInterface instances
*
* @throws UnexpectedTypeException if the given value is not a string
*/
public function reverseTransform($value)
{
if (null === $value || '' === $value) {
return null;
}
if (!is_string($value)) {
throw new UnexpectedTypeException($value, 'string');
}
$usernames = explode(',', $value);
$users = [];
foreach ($usernames as $username) {
$user = $this->userToUsernameTransformer->reverseTransform(trim($username));
if ($user) {
$users[] = $user;
}
}
return $users;
}
/**
* Transforms a string (usernames) to a Collection of UserInterface
*
* @param string $usernames
*
* @throws UnexpectedTypeException
* @throws TransformationFailedException
* @return Collection $recipients
*/
public function reverseTransform($usernames)
{
if (null === $usernames || '' === $usernames) {
return null;
}
if (!is_string($usernames)) {
throw new UnexpectedTypeException($usernames, 'string');
}
$recipients = new ArrayCollection();
$transformer = $this->userToUsernameTransformer;
$recipientsNames = array_filter(explode(',', $usernames));
foreach ($recipientsNames as $username) {
$user = $this->userToUsernameTransformer->reverseTransform(trim($username));
if (!$user instanceof UserInterface) {
throw new TransformationFailedException(sprintf('User "%s" does not exists', $username));
}
$recipients->add($user);
}
return $recipients;
}
