Viewing file:  TwiML.php (3.46 KB) -rw-r--r--
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<?php
namespace Twilio\TwiML;
use DOMDocument;
use DOMElement;
/**
* @property $name string XML element name
* @property $attributes array XML attributes
* @property $value string XML body
* @property $children TwiML[] nested TwiML elements
*/
abstract class TwiML {
protected $name;
protected $attributes;
protected $children;
/**
* TwiML constructor.
*
* @param string $name XML element name
* @param string $value XML value
* @param array $attributes XML attributes
*/
public function __construct(string $name, string $value = null, array $attributes = []) {
$this->name = $name;
$this->attributes = $attributes;
$this->children = [];
if ($value !== null) {
$this->children[] = $value;
}
}
/**
* Add a TwiML element.
*
* @param TwiML|string $twiml TwiML element to add
* @return TwiML $this
*/
public function append($twiml): TwiML {
$this->children[] = $twiml;
return $this;
}
/**
* Add a TwiML element.
*
* @param TwiML $twiml TwiML element to add
* @return TwiML added TwiML element
*/
public function nest(TwiML $twiml): TwiML {
$this->children[] = $twiml;
return $twiml;
}
/**
* Set TwiML attribute.
*
* @param string $key name of attribute
* @param string $value value of attribute
* @return static $this
*/
public function setAttribute(string $key, string $value): TwiML {
$this->attributes[$key] = $value;
return $this;
}
/**
* @param string $name XML element name
* @param string $value XML value
* @param array $attributes XML attributes
* @return TwiML
*/
public function addChild(string $name, string $value = null, array $attributes = []): TwiML {
return $this->nest(new GenericNode($name, $value, $attributes));
}
/**
* Convert TwiML to XML string.
*
* @return string TwiML XML representation
*/
public function asXML(): string {
return (string)$this;
}
/**
* Convert TwiML to XML string.
*
* @return string TwiML XML representation
*/
public function __toString(): string {
return $this->xml()->saveXML();
}
/**
* Build TwiML element.
*
* @param TwiML $twiml TwiML element to convert to XML
* @param DOMDocument $document XML document for the element
* @return DOMElement $element
*/
private function buildElement(TwiML $twiml, DOMDocument $document): DOMElement {
$element = $document->createElement($twiml->name);
foreach ($twiml->attributes as $name => $value) {
if (\is_bool($value)) {
$value = ($value === true) ? 'true' : 'false';
}
$element->setAttribute($name, $value);
}
foreach ($twiml->children as $child) {
if (\is_string($child)) {
$element->appendChild($document->createTextNode($child));
} else {
$element->appendChild($this->buildElement($child, $document));
}
}
return $element;
}
/**
* Build XML element.
*
* @return DOMDocument Build TwiML element
*/
private function xml(): DOMDocument {
$document = new DOMDocument('1.0', 'UTF-8');
$document->appendChild($this->buildElement($this, $document));
return $document;
}
}
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