<?php

class App_Sitemap_Form_Config extends Qs_Form_Config
{
    const TYPE_DEFAULT  = 'default';
    const TYPE_SUBPAGES = 'subPages';

    protected $_blockOptions;
    protected $_pageOptions;

    protected function _getBlockType4Select($key = false)
    {
        if (null === $this->_blockOptions) {
            $this->_blockOptions = [
                ''                  => '-',
                self::TYPE_DEFAULT  => 'Full Sitemap',
                self::TYPE_SUBPAGES => 'Subpages List',
            ];
        }
        return (false !== $key) ? Qs_Array::get($this->_blockOptions, $key) : $this->_blockOptions;
    }

    protected function _getPages4Select()
    {
        if (null === $this->_pageOptions) {
            $this->_pageOptions = ['' => '-'];
            $dataObj = new App_Cms_Obj();
            $filters = ['`Page`.`system` != "y"', '`Page`.`enabled` = "y"'];
            $this->_pageOptions += $dataObj->getPages4Select(0, $filters);
        }
        return $this->_pageOptions;
    }

    protected function _initElements()
    {
        $this->addElement(
            'select',
            'type',
            ['label' => 'Block Type', 'required' => true, 'multiOptions' => $this->_getBlockType4Select()]
        );

        $this->addElement(
            'select',
            'pageId',
            [
                'label'        => 'Select Page',
                'description'  => 'Required for "' . $this->_getBlockType4Select(self::TYPE_SUBPAGES) . '" type',
                'multiOptions' => $this->_getPages4Select(),
                'escapeLabel'  => false,
                'allowEmpty'   => false, // необхідний що б спрацював валідатор Callback
            ]
        );
        /** @var Zend_Form_Element_Select $pageId */
        $pageId = $this->getElement('pageId');
        $pageId->addValidator('Callback', true, [[$this, 'validatePageId']]);
        $pageId->getValidator('Callback')->setMessage(
            'Page required and should have subpages',
            Zend_Validate_Callback::INVALID_VALUE
        );

        return $this;
    }

    public function validatePageId($value, $context)
    {
        $isValid = true;

        if (self::TYPE_SUBPAGES == $context['type']) {
            if ('' == $value) {
                $isValid = false;
            } else {
                $hasChildren = (bool) Qs_SiteMap::findFirst(
                    ['idParent' => $value, 'enabled' => 'y', 'system' => 'n'],
                    null,
                    null,
                    'id'
                );
                if (!$hasChildren) {
                    $isValid = false;
                }
            }
        }

        return $isValid;
    }
}