%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* @author Félix Girault <felix.girault@gmail.com>
* @author Laughingwithu <laughingwithu@gmail.com>
* @license FreeBSD License (http://opensource.org/licenses/BSD-2-Clause)
*/
namespace Essence\Provider;
use Essence\Exception;
use Essence\Media;
use Essence\Media\Preparator;
use Essence\Provider;
use Essence\Dom\Parser as DomParser;
use Essence\Http\Client as HttpClient;
use Essence\Log\Logger;
use Essence\Utility\Hash;
/**
* Base class for an OpenGraph provider.
* This kind of provider extracts embed informations from OpenGraph meta tags.
*
* @package Essence.Provider
*/
class OpenGraph extends Provider {
/**
* Internal HTTP client.
*
* @var Essence\Http\Client
*/
protected $_Http = null;
/**
* Internal DOM parser.
*
* @var Essence\Dom\Parser
*/
protected $_Dom = null;
/**
* Constructor.
*
* @param Essence\Http\Client $Http HTTP client.
* @param Essence\Dom\Parser $Dom DOM parser.
* @param Essence\Log\Logger $Log Logger.
* @param Essence\Log\Preparator $Preparator Preparator.
*/
public function __construct(
HttpClient $Http,
DomParser $Dom,
Logger $Log,
Preparator $Preparator = null
) {
$this->_Http = $Http;
$this->_Dom = $Dom;
parent::__construct( $Log, $Preparator );
}
/**
* {@inheritDoc}
*/
protected function _embed( $url, array $options ) {
return new Media(
Hash::reindex( $this->_extractInformations( $url ), [
'og:type' => 'type',
'og:title' => 'title',
'og:description' => 'description',
'og:site_name' => 'providerName',
'og:image' => 'thumbnailUrl',
'og:image:url' => 'thumbnailUrl',
'og:image:width' => 'width',
'og:image:height' => 'height',
'og:video:width' => 'width',
'og:video:height' => 'height',
'og:url' => 'url'
])
);
}
/**
* Extracts OpenGraph informations from the given URL.
*
* @param string $url URL to fetch informations from.
* @return array Extracted informations.
*/
protected function _extractInformations( $url ) {
$attributes = $this->_Dom->extractAttributes( $this->_Http->get( $url ), [
'meta' => [
'property' => '#^og:.+#i',
'content'
]
]);
$og = [ ];
if ( empty( $attributes['meta'])) {
throw new Exception(
"Unable to extract OpenGraph data from '$url'."
);
} else {
foreach ( $attributes['meta'] as $meta ) {
if ( !isset( $og[ $meta['property']])) {
$og[ $meta['property']] = trim( $meta['content']);
}
}
}
return $og;
}
}
Zerion Mini Shell 1.0