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<?php |
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/** |
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* Copyright (c) 2017–2018 Ryan Parman <http://ryanparman.com>. |
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* Copyright (c) 2017–2018 Contributors. |
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* |
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* http://opensource.org/licenses/Apache2.0 |
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*/ |
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declare(strict_types=1); |
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namespace SimplePie\Util; |
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use DOMNode; |
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use Psr\Log\NullLogger; |
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use SimplePie\Mixin as T; |
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/** |
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* Provides tools for managing and working with XML namespaces. |
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*/ |
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class Ns |
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{ |
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use T\LoggerTrait; |
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/** |
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* A mapping of namespace URIs to preferred namespace aliases. |
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* |
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* @var array |
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*/ |
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protected $mapping = []; |
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/** |
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* Constructs a new instance of this class. |
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* |
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* @param DOMNode $dom A DOMDocument object representing the XML file to be parsed. |
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*/ |
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public function __construct(DOMNode $dom) |
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{ |
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$this->logger = new NullLogger(); |
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$this->domDocument = $dom; |
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$this->mapping = []; |
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} |
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/** |
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* Adds new aliases to this list of aliases. Set an associative array where |
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* the key is the namespace URI and the namespace alias as the value. |
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* |
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* @param array $aliases An associative array of namespace URIs to namespace aliases. |
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* |
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* @return array The updated list of namespace aliases. |
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*/ |
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public function addAliases(array $aliases): array |
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{ |
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$this->mapping = \array_merge($this->mapping, $aliases); |
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$this->getLogger()->info('Added namespace URIs and namespace aliases.', $this->mapping); |
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return $this->mapping; |
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} |
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/** |
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* Gets the list of document-defined namespace aliases and namespace URIs. |
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* |
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* @return array |
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*/ |
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public function getDocNamespaces(): array |
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{ |
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return \simplexml_import_dom($this->domDocument)->getDocNamespaces(true, true); |
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} |
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/** |
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* Gets the preferred namespace alias for a particular feed dialect. |
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* |
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* @param string|null $namespaceUri The namespace URI used inside the XML document. If the value is `null`, then |
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* the preferred namespace alias of the root namespace will be returned. The |
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* default value is `null`. |
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* |
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* @return string|null |
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*/ |
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public function getPreferredNamespaceAlias(?string $namespaceUri = null): ?string |
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{ |
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$namespaceUri = $namespaceUri |
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?? $this->domDocument->documentElement->namespaceUri; |
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// If the namespace URI has an exact match, use it. |
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if (isset($this->mapping[$namespaceUri])) { |
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return $this->mapping[$namespaceUri]; |
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} |
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// If not an exact match, attempt a regex match. |
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foreach ($this->mapping as $regex => $alias) { |
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// Regex delimiter must not be alphanumeric or backslash. Check this first. |
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if (0 === \preg_match('/[0-9a-z\\\\]/i', $regex[0]) && 0 !== \preg_match($regex, $namespaceUri)) { |
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return $alias; |
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} |
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} |
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return null; |
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} |
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} |
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simplepie /
simplepie-ng
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