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<?php
/**
* ownCloud - News
*
* This file is licensed under the Affero General Public License version 3 or
* later. See the COPYING file.
*
* @author Alessandro Cosentino <cosenal@gmail.com>
* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @copyright Alessandro Cosentino 2012
* @copyright Bernhard Posselt 2012, 2014
*/
namespace OCA\News\ArticleEnhancer;
class Enhancer {
private $enhancers = [];
private $globalEnhancers = [];
/**
* @param string $feedUrl
* @param ArticleEnhancer $enhancer
*/
public function registerEnhancer($feedUrl, ArticleEnhancer $enhancer){
$feedUrl = $this->removeTrailingSlash($feedUrl);
// create hashkeys for all supported protocols for quick access
$this->enhancers[$feedUrl] = $enhancer;
$this->enhancers['https://' . $feedUrl] = $enhancer;
$this->enhancers['http://' . $feedUrl] = $enhancer;
$this->enhancers['https://www.' . $feedUrl] = $enhancer;
$this->enhancers['http://www.' . $feedUrl] = $enhancer;
}
/**
* Registers enhancers that are run for every item and after all previous
* enhancers have been run
* @param ArticleEnhancer $enhancer
*/
public function registerGlobalEnhancer (ArticleEnhancer $enhancer) {
$this->globalEnhancers[] = $enhancer;
}
/**
* @param \OCA\News\Db\Item $item
* @param string $feedUrl
* @return \OCA\News\Db\Item enhanced item
*/
public function enhance($item, $feedUrl){
$feedUrl = $this->removeTrailingSlash($feedUrl);
if(array_key_exists($feedUrl, $this->enhancers)) {
$result = $this->enhancers[$feedUrl]->enhance($item);
} else {
$result = $item;
}
foreach ($this->globalEnhancers as $enhancer) {
$result = $enhancer->enhance($result);
}
return $result;
}
/**
* @param string $url
* @return string
*/
private function removeTrailingSlash($url) {
if($url[strlen($url)-1] === '/') {
return substr($url, 0, -1);
} else {
return $url;
}
}
}
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