Rss Block Service

gistfile1.php

<?php
/*
 * This file is part of the Sonata project.
 *
 * (c) Thomas Rabaix <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Sonata\PageBundle\Block;

use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Form\Form;
use Sonata\AdminBundle\Form\FormMapper;
use Sonata\PageBundle\Model\BlockInterface;
use Sonata\PageBundle\Model\PageInterface;

/**
 * PageExtension
 *
 * @author     Thomas Rabaix <[email protected]>
 */
class RssBlockService extends BaseBlockService
{
    public function getName()
    {
        return 'Rss Reader';
    }

    function getDefaultSettings()
    {
        return array(
            'url'     => false,
            'title'   => 'Insert the rss title'
        );
    }

    public function buildCreateForm(FormMapper $formMapper, BlockInterface $block)
    {
        $formMapper->addType('settings', 'sonata_type_immutable_array', array(
            'keys' => array(
                array('url', 'url', array('required' => false)),
                array('title', 'text', array('required' => false)),
            )
        ));
    }

    public function buildEditForm(FormMapper $formMapper, BlockInterface $block)
    {
        return $this->buildCreateForm($formMapper, $block);
    }

    public function execute(BlockInterface $block, PageInterface $page, Response $response = null)
    {
        // merge settings
        $settings = array_merge($this->getDefaultSettings(), $block->getSettings());

        $feeds = false;
        if ($settings['url']) {
            $options = array(
                'http' => array(
                    'user_agent' => 'Sonata/RSS Reader',
                    'timeout' => 2,
                )
            );

            // retrieve contents with a specific stream context to avoid php errors
            $content = @file_get_contents($settings['url'], false, stream_context_create($options));

            if ($content) {
                // generate a simple xml element
                try {
                    $feeds = new \SimpleXMLElement($content);
                    $feeds = $feeds->channel->item;
                } catch(\Exception $e) {
                    // silently fail error
                }
            }
        }

        return $this->renderResponse('SonataPageBundle:Block:block_core_rss.html.twig', array(
            'feeds'     => $feeds,
            'block'     => $block,
            'settings'  => $settings
        ), $response);
    }
}

# Template

{% extends 'SonataPageBundle:Block:block_base.html.twig' %}

{% block block %}
    <h3 class="sonata-feed-title">{{ settings.title }}</h3>

    <div class="sonata-feeds-container">
        {% for feed in feeds %}
            <div>
                <strong><a href="{{ feed.link}}" rel="nofollow" title="{{ feed.title }}">{{ feed.title }}</a></strong>
                <div>{{ feed.description|raw }}</div>
            </div>
        {% else %}
                No feeds available.
        {% endfor %}
    </div>
{% endblock %}