Oefenweb / cakephp-vat-number-check

Model/VatNumberCheck.php

<?php
App::uses('VatNumberCheckAppModel', 'VatNumberCheck.Model');
App::uses('HttpSocket', 'Network/Http');

/**
 * VatNumberCheck Model
 *
 */
class VatNumberCheck extends VatNumberCheckAppModel {

/**
 * Use table.
 *
 * @var mixed False or table name
 */
	public $useTable = false;

/**
 * The (translation) domain to be used for extracted validation messages in models.
 *
 * @var string
 */
	public $validationDomain = 'vat_number_check';

/**
 * Url to check vat numbers.
 *
 */
	const CHECK_URL = 'http://ec.europa.eu/taxation_customs/vies/viesquer.do';

/**
 * Normalizes a VAT number.
 *
 * @param string $vatNumber A VAT number
 * @return string A (normalized) VAT number
 */
	public function normalize($vatNumber) {
		$vatNumber = strtoupper($vatNumber);
		$vatNumber = preg_replace('/[^A-Z0-9]/', '', $vatNumber);

		return $vatNumber;
	}

/**
 * Splits a VAT number into querystring parameters.
 *
 * @param string $vatNumber A VAT number
 * @return array Querystring parameters
 */
	public function toQueryString($vatNumber) {
		$memberStateCode = substr($vatNumber, 0, 2);
		$number = substr($vatNumber, 2);
		$action = 'check';
		$check = 'Verify';

		return compact('memberStateCode', 'number', 'action', 'check');
	}

/**
 * Constructs an url for a given vat number.
 *
 * @param string $vatNumber A VAT number
 * @return string An url
 */
	public function constructUrl($vatNumber) {
		$queryString = $this->toQueryString($vatNumber);
		$queryString = http_build_query($queryString);

		return self::CHECK_URL . '?' . $queryString;
	}

/**
 * Downloads a given url.
 *
 * @param string $url An url
 * @return mixed Request body on success (string) otherwise false (boolean)
 */
	public function getUrlContent($url) {
		$config = (array)Configure::read('VatNumberCheck.socketConfig');
		$HttpSocket = new HttpSocket($config);

		try {
			$response = $HttpSocket->get($url);

			if ($response->isOk()) {
				return $response->body();
			}
		} catch (Exception $e) {

Consider adding a comment why this CATCH block is empty.

		}

		return false;
	}

/**
 * Checks a given VAT number.
 *
 * @param string $vatNumber A VAT number
 * @return bool Valid or not
 * @throws InternalErrorException
 */
	public function check($vatNumber) {
		$url = $this->constructUrl($vatNumber);
		$urlContent = $this->getUrlContent($url);

		if ($urlContent) {
			return (strpos($urlContent, 'Yes, valid VAT number') !== false);
		}

		throw new InternalErrorException(__d('vat_number_check', 'Service unavailable'));
	}

}