<?php

namespace Qs\Form;
use Qs_Db_Table;

/**
 * Class SeoTrait
 * @mixin \Qs_Form
 * @method _getData()
 */
trait SeoTrait
{
    public function addSeoGroup($tableAlias, $sourceField = 'title')
    {
        $this->addPageTitleElement(compact('sourceField'));
        $this->addPageAliasElement('alias', $tableAlias, compact('sourceField'));
        $this->addElement('textarea', 'metaKeywords', ['label' => 'Meta Keywords', 'rows'  => 3]);
        $this->addElement('textarea', 'metaDescription', ['label' => 'Meta Description', 'rows'  => 3]);
        return $this;
    }

    public function addPageTitleElement(array $options = [])
    {
        $defaults = [
            'label'       => 'Page Title',
            'maxlength'   => '255',
            'description' => 'This information will show in the browser tab and in search results.'
        ];
        if ($options['sourceField']) {
            $sourceFields = (array) $options['sourceField'];
            $labels = [];
            foreach ($sourceFields as $sourceField) {
                if (($element = $this->getElement($sourceField))) {
                    $labels[] = $element->getLabel();
                }
            }
            if ($labels) {
                $defaults['description'] .= ' If you leave this field empty - the Page Title will be the same as '
                    . implode(' and ', $labels);
            }
            unset($options['sourceField']);
        }

        $this->addElement('text', 'metaTitle', array_merge($defaults, $options));
        return $this;
    }

    public function addPageAliasElement($name, $tableAlias, array $options = [])
    {
        $defaults = [
            'label'                 => 'Alias',
            'required'              => true,
            'maxlength'             => 200,
            'sourceField'           => 'title',
            'aliasValidatorOptions' => [
                'table'     => new Qs_Db_Table($tableAlias),
                'column'    => $name,
                'currentId' => $this->_getData('id')
            ]
        ];
        $this->addElement('pageAlias', $name, array_merge($defaults, $options));
        return $this;
    }
}