<?php
/**
 * Author : Denis-Florin Rendler
 * Date   : 13/10/15
 * Copyright (c) 2015 Denis-Florin Rendler <connect@rendler.me>
 */

namespace KoderHut\RssFeedster\Classes\Support\Adapters;

use DomElement,
    DOMCdataSection;

use KoderHut\RssFeedster\Classes\Contracts\IAdapter;

/**
 * Class BlogPostXmlAdapter
 * Adapter between the Posts data source and the XML renderer
 *
 * @package KoderHut\RssFeedster\Classes\Support\Adapters
 */
class BlogPostXmlAdapter
    implements IAdapter
{

    /**
     * Transform Post data into XML elements
     *
     * @param mixed $item
     * @param mixed $dataItem
     *
     * @return void
     */
    public function getDataValue($item, $dataItem)
    {
        switch ($item->tagName) {
            case 'title':
                $item->nodeValue = $dataItem->title;
            break;

            case 'link':
            case 'guid':
                $item->nodeValue = $dataItem->url;
            break;

            case 'pubDate':
                $item->nodeValue = $dataItem->published_at->format('r');
            break;

            case 'dc:creator':
                if (!$dataItem->user instanceof User) {
                    break;
                }
                $creator = new DOMCdataSection(
                    "{$dataItem->user->email} ({$dataItem->user->full_name})"
                );
                $item->appendChild($creator);
            break;

            case 'category':
                $categories = $dataItem->categories;

                if (!empty($item->nodeValue)) {
                    break;
                }

                if (0 !== $categories->count()) {
                    $this->addCategories($item, $categories->lists('name'));
                }
            break;

            case 'description':
                $description = new DOMCdataSection($dataItem->summary);
                $item->appendChild($description);
            break;

            case 'content:encoded':
                $content = new DOMCdataSection($dataItem->feed_content);
                $item->appendChild($content);
            break;

            case 'comments':
                $item->nodeValue = $dataItem->comments_url;
            break;

            default:
            break;
        }
    }

    /**
     * Parse and add the categories of the post to the current item
     *
     * @param DomElement $categoryNode
     * @param array      $categories
     */
    protected function addCategories(DomElement $categoryNode, $categories)
    {
        $itemNode = $categoryNode->parentNode;
        $itemNode->removeChild($categoryNode);

        foreach ($categories as $categoryName) {
            $newCategNode = clone($categoryNode);
            $newCategNode->appendChild(new DOMCdataSection($categoryName));

            $itemNode->appendChild($newCategNode);
        }
    }
}