Fixes 3468 - replaces xml_to_object function with MIT licensed implementation.

2 files changed, 103 insertions, 47 deletions

diff --git a/engine/classes/XmlElement.php b/engine/classes/XmlElement.php
index 280bba664..eb7987731 100644
--- a/engine/classes/XmlElement.php
+++ b/engine/classes/XmlElement.php
@@ -6,15 +6,107 @@
  * @subpackage XML
  */
 class XmlElement {
-	/** The name of the element */
-	public $name;
+	/**
+	* @var SimpleXMLElement
+	 */
+	private $_element;
+	
+	/**
+	 * Creates XmlElement from string or existing SimpleXMLElement
+	 * @param string|SimpleXMLElement $xml
+	 */
+	public function __construct($xml) {
+		if ($xml instanceof SimpleXMLElement) {
+			$this->_element = $xml;
+		} else {
+			$this->_element = new SimpleXMLElement($xml);
+		}
+	}
+	
+	/** 
+	 * @return string The name of the element 
+	 */
+	public function getName() {
+		return $this->_element->getName();
+	}
+	
+	/** 
+	 * @return array:string The attributes 
+	 */
+	public function getAttributes() {
+		//include namespace declarations as attributes
+		$xmlnsRaw = $this->_element->getNamespaces();
+		$xmlns = array();
+		foreach ($xmlnsRaw as $key => $val) {
+			$label = 'xmlns'.($key?":$key":$key);
+			$xmlns[$label] = $val;
+		}
+		//get attributes and merge with namespaces
+		$attrRaw = $this->_element->attributes();
+		$attr = array();
+		foreach ($attrRaw as $key => $val) {
+			$attr[$key] = $val;
+		}
+		$attr = array_merge((array)$xmlns, (array)$attr);
+		$result = array();
+		foreach ($attr as $key => $val) {
+			$result[$key] = (string)$val;
+		}
+		return $result;
+	}
+	
+	/** 
+	 * @return string CData 
+	 */
+	public function getContent() {
+		return (string)$this->_element;
+	}
+	
+	/** 
+	 * @return array:XmlElement Child elements 
+	 */
+	public function getChildren() {
+		$children = $this->_element->children();
+		$result = array();
+		foreach ($children as $val) {
+			$result[] = new XmlElement($val);
+		}
+		return $result;
+	}
 
-	/** The attributes */
-	public $attributes;
-
-	/** CData */
-	public $content;
-
-	/** Child elements */
-	public $children;
+	function __get($name) {
+		switch ($name) {
+			case 'name':
+				return $this->getName();
+				break;
+			case 'attributes':
+				return $this->getAttributes();
+				break;
+			case 'content':
+				return $this->getContent();
+				break;
+			case 'children':
+				return $this->getChildren();
+				break;		
+		}
+		return null;
+	}
+	
+	function __isset($name) {
+		switch ($name) {
+			case 'name':
+				return $this->getName()!==null;
+				break;
+			case 'attributes':
+				return $this->getAttributes()!==null;
+				break;
+			case 'content':
+				return $this->getContent()!==null;
+				break;
+			case 'children':
+				return $this->getChildren()!==null;
+				break;
+		}
+		return false;
+	}
 };
diff --git a/engine/lib/xml.php b/engine/lib/xml.php
index 813bc4ee0..4f1ae76a9 100644
--- a/engine/lib/xml.php
+++ b/engine/lib/xml.php
@@ -101,47 +101,11 @@ function serialise_array_to_xml(array $data, $n = 0) {
 
 /**
  * Parse an XML file into an object.
- * Based on code from http://de.php.net/manual/en/function.xml-parse-into-struct.php by
- * efredricksen at gmail dot com
  *
  * @param string $xml The XML
  *
  * @return object
  */
 function xml_to_object($xml) {
-	$parser = xml_parser_create();
-
-	// Parse $xml into a structure
-	xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
-	xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
-	xml_parse_into_struct($parser, $xml, $tags);
-
-	xml_parser_free($parser);
-
-	$elements = array();
-	$stack = array();
-
-	foreach ($tags as $tag) {
-		$index = count($elements);
-
-		if ($tag['type'] == "complete" || $tag['type'] == "open") {
-			$elements[$index] = new XmlElement;
-			$elements[$index]->name = $tag['tag'];
-			$elements[$index]->attributes = elgg_extract('attributes', $tag, '');
-			$elements[$index]->content = elgg_extract('value', $tag, '');
-
-			if ($tag['type'] == "open") {
-				$elements[$index]->children = array();
-				$stack[count($stack)] = &$elements;
-				$elements = &$elements[$index]->children;
-			}
-		}
-
-		if ($tag['type'] == "close") {
-			$elements = &$stack[count($stack) - 1];
-			unset($stack[count($stack) - 1]);
-		}
-	}
-
-	return $elements[0];
+	return new XmlElement($xml);
 }