<?php
/**
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; under version 2
 * of the License (non-upgradable).
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright (c) 2008-2010 (original work) Deutsche Institut für Internationale Pädagogische Forschung (under the project TAO-TRANSFER);
 *               2009-2012 (update and modification) Public Research Centre Henri Tudor (under the project TAO-SUSTAIN & TAO-DEV);
 *
 */

/**
 * Validate string lenght
 *
 * @access public
 * @author Joel Bout, <joel.bout@tudor.lu>
 * @package tao
 */
class tao_helpers_form_validators_Length extends tao_helpers_form_Validator
{
    public function setOptions(array $options)
    {
        parent::setOptions($options);
        
        if ($this->hasOption('min') && $this->hasOption('max')) {
            $this->setMessage(__('Invalid field length') . " (minimum " . $this->getOption('min') . ", maximum " . $this->getOption('max') . ")");
        } elseif ($this->hasOption('min') && !$this->hasOption('max')) {
            $this->setMessage(__('This field is too short') . " (minimum " . $this->getOption('min') . ")");
        } elseif (!$this->hasOption('min') && $this->hasOption('max')) {
            $this->setMessage(__('This field is too long') . " (maximum " . $this->getOption('max') . ")");
        } else {
            throw new Exception("Please set 'min' and/or 'max' options!");
        }
    }


    /**
     * Short description of method evaluate
     *
     * @access public
     * @author Joel Bout, <joel.bout@tudor.lu>
     * @param  values
     * @return boolean
     */
    public function evaluate($values)
    {
        $returnValue = (bool) false;

        
        $returnValue = true;
        
        $values = is_array($values) ? $values : [$values];
        foreach ($values as $value) {
            if ($this->hasOption('min') && mb_strlen($value) < $this->getOption('min')) {
                if ($this->hasOption('allowEmpty') &&  $this->getOption('allowEmpty') && empty($value)) {
                    continue;
                } else {
                    $returnValue = false;
                    break;
                }
            }
            if ($this->hasOption('max') && mb_strlen($value) > $this->getOption('max')) {
                $returnValue = false;
                break;
            }
        }
        

        return (bool) $returnValue;
    }
}