<?php

class Qs_Validate_ConfirmPassword extends Zend_Validate_Abstract
{
    const NOT_MATCH = 'notMatch';
    const MISSING_FIELD_NAME = 'missingField';

    protected $_fieldName;
    protected $_messageTemplates = array(
        self::NOT_MATCH          => 'Password doesn\'t match its confirmation',
        self::MISSING_FIELD_NAME => 'No confirm password field name',
    );

    public function __construct($fieldName = null)
    {
        if (null !== $fieldName) {
            $this->setFieldName($fieldName);
        }
    }

    public function setFieldName($fieldName)
    {
        $this->_fieldName = (string) $fieldName;
        return $this;
    }
    
    public function getFieldName()
    {
        return $this->_fieldName;
    }

    public function isValid($value, $context = null)
    {
        $value = (string) $value;
        $this->_setValue($value);
        $fieldName = $this->getFieldName();

        if (empty($fieldName)) {
            $this->_error(self::MISSING_FIELD_NAME);
            return false;
        }
        
        if (is_array($context)) {
            if (isset($context[$fieldName]) && ($value == $context[$fieldName])) {
                return true;
            }
        } elseif (is_string($context) && ($value == $context)) {
            return true;
        }

        $this->_error(self::NOT_MATCH);
        return false;
    }
}