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