<?php

namespace ProspectOne\UserModule\Validator;

use Zend\Validator\AbstractValidator;

/**

* This validator class is designed for checking if there is an existing user

* with such an email.

*/

class UserExistsValidator extends AbstractValidator

{

/**

* Available validator options.

* @var array

*/

protected $options = array(

'entityManager' => null,

'user' => null

);

// Validation failure message IDs.

const NOT_SCALAR = 'notScalar';

const USER_EXISTS = 'userExists';

/**

* Validation failure messages.

* @var array

*/

protected $messageTemplates = array(

self::NOT_SCALAR => "The email must be a scalar value",

self::USER_EXISTS => "Another user with such an email already exists"

);

/**

* Constructor.

*/

public function __construct($options = null)

{

// Set filter options (if provided).

if(is_array($options)) {

if(isset($options['entityManager']))

$this->options['entityManager'] = $options['entityManager'];

if(isset($options['user']))

$this->options['user'] = $options['user'];

}

// Call the parent class constructor

parent::__construct($options);

}

/**

* Check if user exists.

*/

public function isValid($value)

{

if(!is_scalar($value)) {

$this->error(self::NOT_SCALAR);

return false;

}

// Get Doctrine entity manager.

$entityManager = $this->options['entityManager'];

if (!empty($this->options['user'])) {

$user = $entityManager->getRepository(get_class($this->options['user']))->findOneByEmail($value);

} else {

$user = null;

}

if($this->options['user']==null) {

$isValid = ($user==null);

} else {

if($this->options['user']->getEmail()!=$value && $user!=null)

$isValid = false;

else

$isValid = true;

}

// If there were an error, set error message.

if(!$isValid) {

$this->error(self::USER_EXISTS);

}

// Return validation result.

return $isValid;

}

}