class_EmailValidatorFilter.php

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<?php
class EmailValidatorFilter extends BaseFilter implements Filterable {
        protected function __construct () {
                // Call parent constructor
                parent::__construct(__CLASS__);
        }

        public final static function createEmailValidatorFilter () {
                // Get a new instance
                $filterInstance = new EmailValidatorFilter();

                // Return the instance
                return $filterInstance;
        }

        public function execute (Requestable $requestInstance, Responseable $responseInstance) {
                // Get Email from request
                $email = $requestInstance->getRequestElement('email');

                // Is the Email set?
                if ((is_null($email)) || ($this->getConfigInstance()->readConfig('register_email_unique') === "Y")) {
                        // Try it again
                        $email1 = $requestInstance->getRequestElement('email1');
                        $email2 = $requestInstance->getRequestElement('email2');

                        // Is the email still not set?
                        if ((is_null($email1)) || (is_null($email2))) {
                                // Not found in form so stop the filtering process
                                $requestInstance->requestIsValid(false);

                                // Add a message to the response
                                $responseInstance->addFatalMessage('email_unset');

                                // Abort here
                                return false;
                        } elseif ((empty($email1)) || (empty($email2))) {
                                // Email is empty
                                $requestInstance->requestIsValid(false);

                                // Is the email empty?
                                if (empty($email1)) {
                                        // Add a message to the response
                                        $responseInstance->addFatalMessage('email1_empty');
                                } // END - if

                                // Is the confirmation empty?
                                if (empty($email2)) {
                                        // Add a message to the response
                                        $responseInstance->addFatalMessage('email2_empty');
                                } // END - if

                                // Abort here
                                return false;
                        } elseif ($this->ifEmailIsTaken($email1)) {
                                // Email is already taken
                                $requestInstance->requestIsValid(false);

                                // Add a message to the response
                                $responseInstance->addFatalMessage('email_taken');

                                // Abort here
                                return false;
                        } elseif ($email1 != $email2) {
                                // Emails didn't match
                                $requestInstance->requestIsValid(false);

                                // Add a message to the response
                                $responseInstance->addFatalMessage('emails_mismatch');

                                // Abort here
                                return false;
                        } // END - elseif
                } elseif (empty($email)) {
                        // Empty field!
                        $requestInstance->requestIsValid(false);

                        // Add a message to the response
                        $responseInstance->addFatalMessage('email_empty');

                        // Abort here
                        return false;
                } // END - elseif
        }

        private function ifEmailIsTaken ($email) {
                // Default is already taken
                $alreadyTaken = true;

                // Initialize instance
                $userInstance = null;

                // Get a registry instance
                $registry = Registry::getRegistry();

                // Is the user already there?
                if ($registry->instanceExists('user')) {
                        // Use the instance for checking for the email
                        $userInstance = $registry->getInstance('user');
                        $userInstance->setEmailAddress($email);
                } else {
                        // If this instance is created then the username *does* exist
                        $userInstance = call_user_func_array(array($this->getConfigInstance()->readConfig('user_class'), 'createMemberByEmail'), array($email));

                        // Remember this user instance in our registry for later usage
                        $registry->addInstance('user', $userInstance);
                }

                // Does the email exist?
                if ($userInstance->ifEmailAddressExists() === false) {
                        // This email has not being used yet
                        $alreadyTaken = false;
                }

                // Return the result
                return $alreadyTaken;
        }
}

// [EOF]
?>