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Extend Feed to support CSS style sheet specification #23

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Extend Feed to support CSS style sheet specification #23

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b5817db
Extend Feed to support CSS style sheet specification
Jul 24, 2017
439cbee
Remove debug, and use camelCase naming style
Jul 25, 2017
6fc6fa4
Fix { spacing on render
Jul 25, 2017
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34 changes: 32 additions & 2 deletions src/Suin/RSSWriter/Feed.php
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,23 @@ class Feed implements FeedInterface
/** @var ChannelInterface[] */
protected $channels = [];

protected $feedStyles = [];

/**
* Add Style sheet
* @param string $style_url
* @param string $media (defaults to 'screen')
* @return $this
*/
public function addStyle($style_url, $media = 'screen'){
if( !empty($style_url) ){
$this->feedStyles[] = [ $style_url, $media ];
}

return $this;
}


/**
* Add channel
* @param ChannelInterface $channel
Expand All @@ -30,15 +47,28 @@ public function addChannel(ChannelInterface $channel)
*/
public function render()
{
$xml = new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" />', LIBXML_NOERROR | LIBXML_ERR_NONE | LIBXML_ERR_FATAL);

foreach ($this->channels as $channel) {
$xml = new SimpleXMLElement("<?xml version=\"1.0\" encoding=\"UTF-8\" ?><rss version=\"2.0\" xmlns:content=\"http://purl.org/rss/1.0/modules/content/\" xmlns:atom=\"http://www.w3.org/2005/Atom\" />",
LIBXML_NOERROR | LIBXML_ERR_NONE | LIBXML_ERR_FATAL);


foreach ($this->channels as $channel) {
$toDom = dom_import_simplexml($xml);
$fromDom = dom_import_simplexml($channel->asXML());
$toDom->appendChild($toDom->ownerDocument->importNode($fromDom, true));
}

$dom = new DOMDocument('1.0', 'UTF-8');

if( count($this->feedStyles) > 0 ){
foreach( $this->feedStyles as $info ){
$url = $info[0];
$media = $info[1];
$xslt = $dom->createProcessingInstruction('xml-stylesheet', "type=\"text/css\" media=\"{$media}\" href=\"{$url}\" ");
$dom->appendChild($xslt);
}
}

$dom->appendChild($dom->importNode(dom_import_simplexml($xml), true));
$dom->formatOutput = true;
return $dom->saveXML();
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10 changes: 9 additions & 1 deletion src/Suin/RSSWriter/FeedInterface.php
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Original file line number Diff line number Diff line change
Expand Up @@ -11,10 +11,18 @@ interface FeedInterface
/**
* Add channel
* @param ChannelInterface $channel
* @return $thisJ
* @return $this
*/
public function addChannel(ChannelInterface $channel);

/**
* Add Style sheet
* @param string $style_url
* @param string $media (defaults to 'screen')
* @return $this
*/
public function addStyle($style_url, $media);

/**
* Render XML
* @return string
Expand Down