rss-bridge/bridges/ElsevierBridge.php
Pierre Mazière de1b39c8e5 [core + bridges] get rid of loadMetadata
if a bridge needs to modify some of the data that were initialized
there, ::__construct() should be used instead.

Signed-off-by: Pierre Mazière <pierre.maziere@gmx.com>
2016-08-28 13:05:03 +02:00

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<?php
class ElsevierBridge extends BridgeAbstract{
public $maintainer = 'Pierre Mazière';
public $name = 'Elsevier journals recent articles';
public $uri = 'http://www.journals.elsevier.com';
public $description = 'Returns the recent articles published in Elsevier journals';
public $parameters = array( array(
'j'=>array(
'name'=>'Journal name',
'required'=>true,
'exampleValue'=>'academic-pediactrics',
'title'=>'Insert html-part of your journal'
)
));
// Extracts the list of names from an article as string
private function ExtractArticleName ($article){
$names = $article->find('small', 0);
if($names)
return trim($names->plaintext);
return '';
}
// Extracts the timestamp from an article
private function ExtractArticleTimestamp ($article){
$time = $article->find('.article-info', 0);
if($time){
$timestring = trim($time->plaintext);
/*
The format depends on the age of an article:
- Available online 29 July 2016
- July 2016
- MayJune 2016
*/
if(preg_match('/\S*(\d+\s\S+\s\d{4})/ims', $timestring, $matches)){
return strtotime($matches[0]);
} elseif (preg_match('/[A-Za-z]+\-([A-Za-z]+\s\d{4})/ims', $timestring, $matches)){
return strtotime($matches[0]);
} elseif (preg_match('/([A-Za-z]+\s\d{4})/ims', $timestring, $matches)){
return strtotime($matches[0]);
} else {
return 0;
}
}
return 0;
}
// Extracts the content from an article
private function ExtractArticleContent ($article){
$content = $article->find('.article-content', 0);
if($content){
return trim($content->plaintext);
}
return '';
}
public function collectData(){
$param=$this->parameters[$this->queriedContext];
$uri = 'http://www.journals.elsevier.com/' . $param['j']['value'] . '/recent-articles/';
$html = $this->getSimpleHTMLDOM($uri) or $this->returnServerError('No results for Elsevier journal '.$param['j']['value']);
foreach($html->find('.pod-listing') as $article){
$item = array();
$item['uri'] = $article->find('.pod-listing-header>a',0)->getAttribute('href').'?np=y';
$item['title'] = $article->find('.pod-listing-header>a',0)->plaintext;
$item['author'] = $this->ExtractArticleName($article);
$item['timestamp'] = $this->ExtractArticleTimestamp($article);
$item['content'] = $this->ExtractArticleContent($article);
$this->items[] = $item;
}
}
public function getCacheDuration(){
return 43200; // 12h
}
}
?>