ManifestDocument.php
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<?php
/*
* This file is part of PharIo\Manifest.
*
* (c) Arne Blankerts <arne@blankerts.de>, Sebastian Heuer <sebastian@phpeople.de>, Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace PharIo\Manifest;
use DOMDocument;
use DOMElement;
class ManifestDocument {
const XMLNS = 'https://phar.io/xml/manifest/1.0';
/**
* @var DOMDocument
*/
private $dom;
/**
* ManifestDocument constructor.
*
* @param DOMDocument $dom
*/
private function __construct(DOMDocument $dom) {
$this->ensureCorrectDocumentType($dom);
$this->dom = $dom;
}
public static function fromFile($filename) {
if (!file_exists($filename)) {
throw new ManifestDocumentException(
sprintf('File "%s" not found', $filename)
);
}
return self::fromString(
file_get_contents($filename)
);
}
public static function fromString($xmlString) {
$prev = libxml_use_internal_errors(true);
libxml_clear_errors();
$dom = new DOMDocument();
$dom->loadXML($xmlString);
$errors = libxml_get_errors();
libxml_use_internal_errors($prev);
if (count($errors) !== 0) {
throw new ManifestDocumentLoadingException($errors);
}
return new self($dom);
}
public function getContainsElement() {
return new ContainsElement(
$this->fetchElementByName('contains')
);
}
public function getCopyrightElement() {
return new CopyrightElement(
$this->fetchElementByName('copyright')
);
}
public function getRequiresElement() {
return new RequiresElement(
$this->fetchElementByName('requires')
);
}
public function hasBundlesElement() {
return $this->dom->getElementsByTagNameNS(self::XMLNS, 'bundles')->length === 1;
}
public function getBundlesElement() {
return new BundlesElement(
$this->fetchElementByName('bundles')
);
}
private function ensureCorrectDocumentType(DOMDocument $dom) {
$root = $dom->documentElement;
if ($root->localName !== 'phar' || $root->namespaceURI !== self::XMLNS) {
throw new ManifestDocumentException('Not a phar.io manifest document');
}
}
/**
* @param $elementName
*
* @return DOMElement
*
* @throws ManifestDocumentException
*/
private function fetchElementByName($elementName) {
$element = $this->dom->getElementsByTagNameNS(self::XMLNS, $elementName)->item(0);
if (!$element instanceof DOMElement) {
throw new ManifestDocumentException(
sprintf('Element %s missing', $elementName)
);
}
return $element;
}
}