Created
January 5, 2019 12:02
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Quick and dirty workaround for https://github.com/suin/php-rss-writer/issues/28
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<?php | |
namespace BorrameCom\RSSWriter; | |
class Channel extends \Suin\RSSWriter\Channel | |
{ | |
/** | |
* @var string | |
*/ | |
protected $imageUrl; | |
/** | |
* @var string | |
*/ | |
protected $imageTitle; | |
/** | |
* @var string | |
*/ | |
protected $imageLink; | |
/** | |
* @param string $url URL of a GIF, JPEG or PNG image that represents the channel. | |
* @param string $title Describes the image, it's used in the ALT attribute of the HTML <img> tag when the channel is rendered in HTML. | |
* @param string $link URL of the site, when the channel is rendered, the image is a link to the site. | |
* @return $this | |
* | |
* @link https://cyber.harvard.edu/rss/rss.html#ltimagegtSubelementOfLtchannelgt | |
*/ | |
public function image(string $url, string $title, string $link): Channel | |
{ | |
$this->imageUrl = $url; | |
$this->imageTitle = $title; | |
$this->imageLink = $link; | |
return $this; | |
} | |
public function asXML(): \SimpleXMLElement | |
{ | |
$image = new \SimpleXMLElement('<image />'); | |
if ($this->imageUrl !== null) { | |
$image->addChild('url', $this->imageUrl); | |
} | |
if ($this->imageTitle !== null) { | |
$image->addChild('title', $this->imageTitle); | |
} | |
if ($this->imageLink !== null) { | |
$image->addChild('link', $this->imageLink); | |
} | |
$xml = parent::asXML(); | |
$this->insertBefore($image, $xml->xpath('/channel/item')[0]); | |
return $xml; | |
} | |
private function insertBefore(\SimpleXMLElement $insert, \SimpleXMLElement $target): void | |
{ | |
$target_dom = dom_import_simplexml($target); | |
$insert_dom = $target_dom->ownerDocument->importNode(dom_import_simplexml($insert), true); | |
$target_dom->parentNode->insertBefore($insert_dom, $target_dom); | |
} | |
} |
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