1 files changed, 202 insertions, 0 deletions
diff --git a/engine/classes/ODDDocument.php b/engine/classes/ODDDocument.php
new file mode 100644
index 000000000..540c35a3b
--- /dev/null
+++ b/engine/classes/ODDDocument.php
@@ -0,0 +1,202 @@
+<?php
+/**
+ * This class is used during import and export to construct.
+ *
+ * @package    Elgg.Core
+ * @subpackage ODD
+ */
+class ODDDocument implements Iterator {
+	/**
+	 * ODD Version
+	 *
+	 * @var string
+	 */
+	private $ODDSupportedVersion = "1.0";
+
+	/**
+	 * Elements of the document.
+	 */
+	private $elements;
+
+	/**
+	 * Optional wrapper factory.
+	 */
+	private $wrapperfactory;
+
+	/**
+	 * Create a new ODD Document.
+	 *
+	 * @param array $elements Elements to add
+	 *
+	 * @return void
+	 */
+	public function __construct(array $elements = NULL) {
+		if ($elements) {
+			if (is_array($elements)) {
+				$this->elements = $elements;
+			} else {
+				$this->addElement($elements);
+			}
+		} else {
+			$this->elements = array();
+		}
+	}
+
+	/**
+	 * Return the version of ODD being used.
+	 *
+	 * @return string
+	 */
+	public function getVersion() {
+		return $this->ODDSupportedVersion;
+	}
+
+	/**
+	 * Returns the number of elements
+	 *
+	 * @return int
+	 */
+	public function getNumElements() {
+		return count($this->elements);
+	}
+
+	/**
+	 * Add an element
+	 *
+	 * @param ODD $element An ODD element
+	 *
+	 * @return void
+	 */
+	public function addElement(ODD $element) {
+		if (!is_array($this->elements)) {
+			$this->elements = array();
+		}
+		$this->elements[] = $element;
+	}
+
+	/**
+	 * Add multiple elements at once
+	 *
+	 * @param array $elements Array of ODD elements
+	 *
+	 * @return void
+	 */
+	public function addElements(array $elements) {
+		foreach ($elements as $element) {
+			$this->addElement($element);
+		}
+	}
+
+	/**
+	 * Return all elements
+	 *
+	 * @return array
+	 */
+	public function getElements() {
+		return $this->elements;
+	}
+
+	/**
+	 * Set an optional wrapper factory to optionally embed the ODD document in another format.
+	 *
+	 * @param ODDWrapperFactory $factory The factory
+	 *
+	 * @return void
+	 */
+	public function setWrapperFactory(ODDWrapperFactory $factory) {
+		$this->wrapperfactory = $factory;
+	}
+
+	/**
+	 * Magic function to generate valid ODD XML for this item.
+	 *
+	 * @return string
+	 */
+	public function __toString() {
+		$xml = "";
+
+		if ($this->wrapperfactory) {
+			// A wrapper has been provided
+			$wrapper = $this->wrapperfactory->getElementWrapper($this); // Get the wrapper for this element
+
+			$xml = $wrapper->wrap($this); // Wrap this element (and subelements)
+		} else {
+			// Output begin tag
+			$generated = date("r");
+			$xml .= "<odd version=\"{$this->ODDSupportedVersion}\" generated=\"$generated\">\n";
+
+			// Get XML for elements
+			foreach ($this->elements as $element) {
+				$xml .= "$element";
+			}
+
+			// Output end tag
+			$xml .= "</odd>\n";
+		}
+
+		return $xml;
+	}
+
+	// ITERATOR INTERFACE //////////////////////////////////////////////////////////////
+	/*
+	 * This lets an entity's attributes be displayed using foreach as a normal array.
+	 * Example: http://www.sitepoint.com/print/php5-standard-library
+	 */
+
+	private $valid = FALSE;
+
+	/**
+	 * Iterator interface
+	 *
+	 * @see Iterator::rewind()
+	 *
+	 * @return void
+	 */
+	function rewind() {
+		$this->valid = (FALSE !== reset($this->elements));
+	}
+
+	/**
+	 * Iterator interface
+	 *
+	 * @see Iterator::current()
+	 *
+	 * @return void
+	 */
+	function current() {
+		return current($this->elements);
+	}
+
+	/**
+	 * Iterator interface
+	 *
+	 * @see Iterator::key()
+	 *
+	 * @return void
+	 */
+	function key() {
+		return key($this->elements);
+	}
+
+	/**
+	 * Iterator interface
+	 *
+	 * @see Iterator::next()
+	 *
+	 * @return void
+	 */
+	function next() {
+		$this->valid = (FALSE !== next($this->elements));
+	}
+
+	/**
+	 * Iterator interface
+	 *
+	 * @see Iterator::valid()
+	 *
+	 * @return void
+	 */
+	function valid() {
+		return $this->valid;
+	}
+}