Chris@2: <?php
Chris@2: /*
Chris@2:  * This file is part of PharIo\Manifest.
Chris@2:  *
Chris@2:  * (c) Arne Blankerts <arne@blankerts.de>, Sebastian Heuer <sebastian@phpeople.de>, Sebastian Bergmann <sebastian@phpunit.de>
Chris@2:  *
Chris@2:  * For the full copyright and license information, please view the LICENSE
Chris@2:  * file that was distributed with this source code.
Chris@2:  */
Chris@2: 
Chris@2: namespace PharIo\Manifest;
Chris@2: 
Chris@2: use DOMDocument;
Chris@2: use DOMElement;
Chris@2: 
Chris@2: class ManifestDocument {
Chris@2:     const XMLNS = 'https://phar.io/xml/manifest/1.0';
Chris@2: 
Chris@2:     /**
Chris@2:      * @var DOMDocument
Chris@2:      */
Chris@2:     private $dom;
Chris@2: 
Chris@2:     /**
Chris@2:      * ManifestDocument constructor.
Chris@2:      *
Chris@2:      * @param DOMDocument $dom
Chris@2:      */
Chris@2:     private function __construct(DOMDocument $dom) {
Chris@2:         $this->ensureCorrectDocumentType($dom);
Chris@2: 
Chris@2:         $this->dom = $dom;
Chris@2:     }
Chris@2: 
Chris@2:     public static function fromFile($filename) {
Chris@2:         if (!file_exists($filename)) {
Chris@2:             throw new ManifestDocumentException(
Chris@2:                 sprintf('File "%s" not found', $filename)
Chris@2:             );
Chris@2:         }
Chris@2: 
Chris@2:         return self::fromString(
Chris@2:             file_get_contents($filename)
Chris@2:         );
Chris@2:     }
Chris@2: 
Chris@2:     public static function fromString($xmlString) {
Chris@2:         $prev = libxml_use_internal_errors(true);
Chris@2:         libxml_clear_errors();
Chris@2: 
Chris@2:         $dom = new DOMDocument();
Chris@2:         $dom->loadXML($xmlString);
Chris@2: 
Chris@2:         $errors = libxml_get_errors();
Chris@2:         libxml_use_internal_errors($prev);
Chris@2: 
Chris@2:         if (count($errors) !== 0) {
Chris@2:             throw new ManifestDocumentLoadingException($errors);
Chris@2:         }
Chris@2: 
Chris@2:         return new self($dom);
Chris@2:     }
Chris@2: 
Chris@2:     public function getContainsElement() {
Chris@2:         return new ContainsElement(
Chris@2:             $this->fetchElementByName('contains')
Chris@2:         );
Chris@2:     }
Chris@2: 
Chris@2:     public function getCopyrightElement() {
Chris@2:         return new CopyrightElement(
Chris@2:             $this->fetchElementByName('copyright')
Chris@2:         );
Chris@2:     }
Chris@2: 
Chris@2:     public function getRequiresElement() {
Chris@2:         return new RequiresElement(
Chris@2:             $this->fetchElementByName('requires')
Chris@2:         );
Chris@2:     }
Chris@2: 
Chris@2:     public function hasBundlesElement() {
Chris@2:         return $this->dom->getElementsByTagNameNS(self::XMLNS, 'bundles')->length === 1;
Chris@2:     }
Chris@2: 
Chris@2:     public function getBundlesElement() {
Chris@2:         return new BundlesElement(
Chris@2:             $this->fetchElementByName('bundles')
Chris@2:         );
Chris@2:     }
Chris@2: 
Chris@2:     private function ensureCorrectDocumentType(DOMDocument $dom) {
Chris@2:         $root = $dom->documentElement;
Chris@2: 
Chris@2:         if ($root->localName !== 'phar' || $root->namespaceURI !== self::XMLNS) {
Chris@2:             throw new ManifestDocumentException('Not a phar.io manifest document');
Chris@2:         }
Chris@2:     }
Chris@2: 
Chris@2:     /**
Chris@2:      * @param $elementName
Chris@2:      *
Chris@2:      * @return DOMElement
Chris@2:      *
Chris@2:      * @throws ManifestDocumentException
Chris@2:      */
Chris@2:     private function fetchElementByName($elementName) {
Chris@2:         $element = $this->dom->getElementsByTagNameNS(self::XMLNS, $elementName)->item(0);
Chris@2: 
Chris@2:         if (!$element instanceof DOMElement) {
Chris@2:             throw new ManifestDocumentException(
Chris@2:                 sprintf('Element %s missing', $elementName)
Chris@2:             );
Chris@2:         }
Chris@2: 
Chris@2:         return $element;
Chris@2:     }
Chris@2: }