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<?php |
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declare(strict_types=1); |
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namespace SimpleSAML\XML; |
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use DOMElement; |
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use SimpleSAML\Assert\Assert; |
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use SimpleSAML\XML\Constants; |
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use SimpleSAML\XML\Exception\InvalidDOMElementException; |
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use SimpleSAML\XML\Exception\SchemaViolationException; |
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use function str_replace; |
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/** |
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* Trait grouping common functionality for simple elements with base64 textContent |
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* |
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* @package simplesamlphp/xml-common |
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*/ |
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trait Base64ElementTrait |
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{ |
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/** @var string */ |
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protected string $content; |
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/** |
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* Set the content of the element. |
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* |
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* @param string $content The value to go in the XML textContent |
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*/ |
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protected function setContent(string $content): void |
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{ |
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$this->validateContent($content); |
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$this->content = $content; |
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} |
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/** |
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* Get the content of the element. |
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* |
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* @return string |
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*/ |
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public function getContent(): string |
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{ |
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return $this->sanitizeContent($this->getRawContent()); |
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} |
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/** |
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* Get the raw and unsanitized content of the element. |
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* |
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* @return string |
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*/ |
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public function getRawContent(): string |
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{ |
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return $this->content; |
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} |
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/** |
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* Sanitize the content of the element. |
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* |
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* @param string $content The unsanitized textContent |
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* @throws \Exception on failure |
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* @return string |
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*/ |
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protected function sanitizeContent(string $content): string |
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{ |
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return str_replace(["\r", "\n", "\t", ' '], '', $content); |
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} |
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/** |
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* Validate the content of the element. |
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* |
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* @param string $content The value to go in the XML textContent |
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* @throws \Exception on failure |
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* @return void |
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*/ |
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protected function validateContent(string $content): void |
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{ |
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// Note: content must already be sanitized before validating |
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Assert::stringPlausibleBase64( |
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$this->sanitizeContent($content), |
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SchemaViolationException::class |
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); |
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} |
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/** |
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* Convert XML into a class instance |
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* |
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* @param \DOMElement $xml The XML element we should load |
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* @return static |
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* |
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* @throws \SimpleSAML\XML\Exception\InvalidDOMElementException |
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* If the qualified name of the supplied element is wrong |
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*/ |
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public static function fromXML(DOMElement $xml): static |
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{ |
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Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class); |
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Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class); |
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return new static($xml->textContent); |
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} |
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/** |
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* Convert this element to XML. |
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* |
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* @param \DOMElement|null $parent The element we should append this element to. |
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* @return \DOMElement |
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*/ |
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public function toXML(DOMElement $parent = null): DOMElement |
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{ |
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$e = $this->instantiateParentElement($parent); |
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$e->textContent = $this->getRawContent(); |
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return $e; |
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} |
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/** @return string */ |
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abstract public static function getLocalName(): string; |
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/** |
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* Create a document structure for this element |
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* |
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* @param \DOMElement|null $parent The element we should append to. |
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* @return \DOMElement |
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*/ |
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abstract public function instantiateParentElement(DOMElement $parent = null): DOMElement; |
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} |
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simplesamlphp /
xml-common
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