Source for file FormFieldSet.class.php

<?php
/**
 * @package harmoni.utilities
 */
 
require_once HARMONI."utlities/FieldSetValidator/FieldSet.class.php";
 
/**
 *
 * @package harmoni.utilities
 * 
 * @copyright Copyright &copy; 2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License (GPL)
 *
 * @version $Id: FormFieldSet.class.php,v 1.3 2005/02/04 15:59:13 adamfranco Exp $
 */
class FormFieldSet extends FieldSet {
 
    var $_changed;
    var $_valid;
    
    function FormFieldSet( $fields = null ) {
        $this->_changed=array();
        $this->_valid = array();
        if ($fields && is_array($fields)) {
            foreach (array_keys($fields) as $k) {
                $this->_changed[$k] = false;
                $this->_valid[$k] = true;
            }
        }
        parent::FieldSet( $fields );
    }
    
    function set( $key, $val ) {
        $oldVal = $this->get($key);
        if ($oldVal == $val) return; // we would use '===' here, but we can't be sure
                                    // that form data from the user will be of the same
                                    // variable type. ie, "5" == 5 is true, but "5" === 5
                                    // is not
        
        parent::set($key,$val);
        $this->_changed[$key] = true;
    }
    
    function clear() {
        $this->_changed = array();
        parent::clear();
    }
    
    function validate( $key, $rule, $error = null, $errorHandler=null ) {
        if (!$rule->check($this->get($key))) {
            $this->_valid[$key] = false;
            if ($error) {
                if (!$errorHandler) $errorHandler=&Services::getService("UserError");
                $errorHandler->addError($error);
                return false;
            }
        }
        return true;
    }
    
    function hasErrors() {
        foreach ($this->_valid as $v) {
            if (!$v) return false;
        }
        return true;
    }
    
    function changed($key) {
        return $this->_changed[$key];
    }
}
 
?>