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<?php
class ElsevierBridge extends BridgeAbstract {
const MAINTAINER = 'Pierre Mazière';
const NAME = 'Elsevier journals recent articles';
const URI = 'http://www.journals.elsevier.com/';
const CACHE_TIMEOUT = 43200; //12h
const DESCRIPTION = 'Returns the recent articles published in Elsevier journals';
const 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
- May–June 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(){
$uri = self::URI . $this->getInput('j') . '/recent-articles/';
$html = getSimpleHTMLDOM($uri)
or returnServerError('No results for Elsevier journal ' . $this->getInput('j'));
foreach($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;
}
}
}
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