/mvc/components/shorturl

<?php
class shorturlComponent {
    /**
     * Short URL logic to either display new URL form, forward to the URL associated with a Short URL or throw 404
 error
     */
    public function __construct() {
        if (isset(mvc::$params[0])) {
            $model = get::model('shorturl');
            $shortUrl = $model->getShortUrl(mvc::$params[0]);
            if ($shortUrl) {
                $model->logForward(mvc::$params[0]);
                load::redirect($shortUrl);
            } else {
                mvc::$controller = get::$config->errorHandler; //404
                mvc::$action = 'notFound';
                return;
            }
        }
        $this->_createShortUrl();
    }

    /**
     * Create a new short URL
     */
    protected function _createShortUrl() {
        if (isset($_POST['url'])) {
            $_POST['url'] = trim($_POST['url']);
            if (strpos($_POST['url'], 'http') !== 0) {
                $_POST['url'] = 'http://' . $_POST['url'];
            }
            require_once get::$config->packagesPath() . 'validator';
            $Validator = new Validator;
            if (!filter_var($_POST['url'], FILTER_VALIDATE_URL) || !$Validator->isValidUrl($_POST['url'])) {
                $_POST['errors']['url'] = 'URL does not appear to be valid';
            } else {
                $_POST['shortUrl'] = get::model('shorturl')->addShortUrl($_POST['url']);
            }
        }
    }
}