<?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.
// $Id$

function validator_distinct($input, $parameter = '', $message = '')
{
    $trklib = TikiLib::lib('trk');
    parse_str($parameter, $arr);

    if (count($arr) < 2 || ! isset($arr['trackerId']) || ! isset($arr['fieldId'])) {
        return tra("Edit field: (Parameter needs to be 'trackerId=XX&fieldId=YY&itemId=ZZ' or be empty to use the current field).");
    }
    if (! isset($arr['itemId']) || $arr['itemId'] < 1) {
        $arr['itemId'] = 0;
    }

    $info = $trklib->get_tracker_field($arr['fieldId']);

    if (! $info || $info['validation'] != 'distinct' || (! empty($info['validationParam']) && $info['validationParam'] != $parameter)) {
        return tra("Edit field: (Incorrect validation parameter).");
    }

    if ($trklib->check_field_value_exists($input, $arr['fieldId'], $arr['itemId'])) {
        return tra(empty($message) ? "Value already exists" : $message);
    }

    return true;
}