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<?php
/**
* Open Data Definition (ODD) superclass.
* @package Elgg
* @subpackage Core
* @author Curverider Ltd
*/
abstract class ODD {
/**
* Attributes.
*/
private $attributes = array();
/**
* Optional body.
*/
private $body;
/**
* Construct an ODD document with initial values.
*/
public function __construct() {
$this->body = "";
}
public function getAttributes() {
return $this->attributes;
}
public function setAttribute($key, $value) {
$this->attributes[$key] = $value;
}
public function getAttribute($key) {
if (isset($this->attributes[$key])) {
return $this->attributes[$key];
}
return NULL;
}
public function setBody($value) {
$this->body = $value;
}
public function getBody() {
return $this->body;
}
/**
* Set the published time.
*
* @param int $time Unix timestamp
*/
public function setPublished($time) {
$this->attributes['published'] = date("r", $time);
}
/**
* Return the published time as a unix timestamp.
*
* @return int or false on failure.
*/
public function getPublishedAsTime() {
return strtotime($this->attributes['published']);
}
/**
* For serialisation, implement to return a string name of the tag eg "header" or "metadata".
* @return string
*/
abstract protected function getTagName();
/**
* Magic function to generate valid ODD XML for this item.
*/
public function __toString() {
// Construct attributes
$attr = "";
foreach ($this->attributes as $k => $v) {
$attr .= ($v!="") ? "$k=\"$v\" " : "";
}
$body = $this->getBody();
$tag = $this->getTagName();
$end = "/>";
if ($body!="") {
$end = "><![CDATA[$body]]></{$tag}>";
}
return "<{$tag} $attr" . $end . "\n";
}
}
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