<?php

class App_Cms_Validate_XmlAliasUnique extends Zend_Validate_Abstract
{
    const NOT_UNIQUE = 'notUnique';
    protected $_parentAlias;
    protected $_messageTemplates = [
        self::NOT_UNIQUE => 'Alias must be unique',
    ];

    public function __construct($options = [])
    {
        if (is_array($options) && !empty($options)) {
            $this->setOptions($options);
        }
    }

    public function setOptions($options)
    {
        if (isset($options['options'])) {
            unset($options['options']);
        }
        foreach ($options as $key => $value) {
            $method = 'set' . ucfirst($key);
            if (method_exists($this, $method)) {
                // Setter exists; use it
                $this->$method($value);
            }
        }
    }

    public function setParentAlias($alias)
    {
        $this->_parentAlias = $alias;
        return $this;
    }

    public function getParentAlias()
    {
        return $this->_parentAlias;
    }

    public function isValid($value, $context = null)
    {
        $value = (string) $value;
        $fullAlias = $this->_parentAlias . ((empty($this->_parentAlias)) ? '' : '/') . $value;
        $pages = Qs_SiteMap::find(['source' => 'xml', 'fullAlias' => $fullAlias]);
        if (empty($pages)) {
            return true;
        }
        $this->_error(self::NOT_UNIQUE);
        return false;
    }
}