<?php

/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Validate.php 3278 2007-02-07 21:54:50Z darby $
 */


/**
 * @see Zend_Validate_Interface
 */
require_once 'Zend/Validate/Interface.php';


/**
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Validate implements Zend_Validate_Interface
{
    /**
     * Validator chain
     *
     * @var array
     */
    protected $_validators = array();

    /**
     * Array of validation failure messages
     *
     * @var array
     */
    protected $_messages = array();

    /**
     * Adds a validator to the end of the chain
     *
     * If $breakChainOnFailure is true, then if the validator fails, the next validator in the chain,
     * if one exists, will not be executed.
     *
     * @param  Zend_Validate_Interface $validator
     * @param  boolean                 $breakChainOnFailure
     * @return Zend_Validate Provides a fluent interface
     */
    public function addValidator(Zend_Validate_Interface $validator, $breakChainOnFailure = false)
    {
        $this->_validators[] = array('instance' => $validator, 'breakChainOnFailure' => $breakChainOnFailure);
        return $this;
    }

    /**
     * Returns true if and only if $value passes all validations in the chain
     *
     * Validators are run in the order in which they were added to the chain (FIFO).
     *
     * @param  mixed $value
     * @return boolean
     */
    public function isValid($value)
    {
        $this->_messages = array();
        $result = true;
        foreach ($this->_validators as $element) {
            $validator = $element['instance'];
            if ($validator->isValid($value)) {
                continue;
            }
            $result = false;
            $this->_messages = $this->_messages + $validator->getMessages();
            if ($element['breakChainOnFailure']) {
                break;
            }
        }
        return $result;
    }

    /**
     * Defined by Zend_Validate_Interface
     *
     * Returns array of validation failure messages
     *
     * @return array
     */
    public function getMessages()
    {
        return $this->_messages;
    }
}