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<?php
// (c) Copyright 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.
// $Id$
class Tiki_Formula_Function_TrackerField extends Math_Formula_Function
{
public function evaluate($element)
{
$default = 0;
$allowed = [ 'object', 'field' ];
if ($extra = $element->getExtraValues($allowed)) {
$this->error(tr('Unexpected values: %0', implode(', ', $extra)));
}
$object = $element->object;
if (! $object || count($object) != 2) {
$this->error(tra('Item must be provided and contain one argument: type, object-id'));
}
$type = $this->evaluateChild($object[0]);
$object = $this->evaluateChild($object[1]);
$field = $element->field;
if (! $field || count($field) != 1) {
$this->error(tra('Field must be provided and contain one argument: field permanent name'));
}
$field = $field[0];
if ($type != 'trackeritem') {
return $default;
}
return $this->fetchValue($object, $field, $default);
}
protected function fetchValue($object, $field, $default)
{
$trklib = TikiLib::lib('trk');
$item = $trklib->get_tracker_item($object);
if (! $item) {
return $default;
}
if (! $definition = Tracker_Definition::get($item['trackerId'])) {
return $default;
}
if (! $field = $definition->getFieldFromPermName($field)) {
return $default;
}
$fieldId = $field['fieldId'];
if (! isset($item[$fieldId])) {
return $default;
}
return $item[$fieldId];
}
}