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- <?php
- class ElsevierBridge extends BridgeAbstract{
- public function loadMetadatas() {
- $this->maintainer = 'Pierre Mazière';
- $this->name = 'Elsevier journals recent articles';
- $this->uri = 'http://www.journals.elsevier.com';
- $this->description = 'Returns the recent articles published in Elsevier journals';
- $this->parameters[] = array(
- 'j'=>array(
- 'name'=>'Journal name',
- 'required'=>true,
- 'exampleValue'=>'academic-pediactrics',
- 'title'=>'Insert html-part of your journal'
- )
- );
- }
- // Extracts the list of names from an article as string
- private function ExtractArticleName ($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(array $param){
- $uri = 'http://www.journals.elsevier.com/' . $param['j'] . '/recent-articles/';
- $html = $this->getSimpleHTMLDOM($uri) or $this->returnServerError('No results for Elsevier journal '.$param['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;
- }
- }
- public function getCacheDuration(){
- return 43200; // 12h
- }
- }
- ?>
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