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Path: /data/applications/aps/tikiwiki/7.0-0/standard/htdocs/lib/rating/formula/ [ Home ]
File: Attribute.php
<?php
// (c) Copyright 2002-2011 by authors of the Tiki Wiki CMS Groupware Project
// 
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id: Attribute.php 33195 2011-03-02 17:43:40Z changi67 $

require_once 'Math/Formula/Function.php';

class Tiki_Formula_Function_Attribute extends Math_Formula_Function
{
	function evaluate( $element ) {
		$allowed = array( 'object', 'default', 'property' );

		if( $extra = $element->getExtraValues( $allowed ) ) {
			$this->error( tr('Unexpected values: %0', implode( ', ', $extra ) ) );
		}

		$object = $element->object;

		if( ! $object || count( $object ) != 2 ) {
			$this->error( tra("Object must be provided and contain two arguments: type and object") );
		}

		$type = $this->evaluateChild( $object[0] );
		$object = $this->evaluateChild( $object[1] );

		if( ( $property = $element->property ) && count($property) == 1 ) {
			$property = $property[0];
		} else {
			$this->error( tra('Invalid property.') );
		}

		global $attributelib; require_once 'lib/attributes/attributelib.php';

		if( $type == 'wiki page' ) {
			global $tikilib;
			$object = $tikilib->get_page_name_from_id( $object );
		}

		$values = $attributelib->get_attributes( $type, $object );

		if( isset( $values[$property] ) ) {
			return $values[$property];
		} elseif( ( $default = $element->default ) && count($default) == 1 ) {
			return $this->evaluateChild( $default[0] );
		} else {
			return 0;
		}
	}
}