156 lines
4.1 KiB
PHP
156 lines
4.1 KiB
PHP
<?php
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/**
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* RssBridgeLWNprev
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*
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* @name LWNPrev Bridge
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* @description Returns the articles from the previous LWN.net edition
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*/
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class LWNprevBridge extends BridgeAbstract{
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public function loadMetadatas() {
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$this->maintainer = 'Pierre Mazière';
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$this->name = 'LWN Free Weekly Edition';
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$this->uri = 'https://lwn.net/free/bigpage';
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$this->description = 'LWN Free Weekly Edition available one week late';
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$this->update = '2016-19-01';
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}
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private function jumpToNextTag(&$node){
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while($node && $node->nodeType===XML_TEXT_NODE){
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$nextNode=$node->nextSibling;
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if(!$nextNode){
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break;
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}
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$node=$nextNode;
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}
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}
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private function jumpToPreviousTag(&$node){
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while($node && $node->nodeType===XML_TEXT_NODE){
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$previousNode=$node->previousSibling;
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if(!$previousNode){
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break;
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}
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$node=$previousNode;
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}
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}
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public function collectData(array $param){
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// Because the LWN page is written in loose HTML and not XHTML,
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// Simple HTML Dom is not accurate enough for the job
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$html = advanced_file_get_contents('https://lwn.net/free/bigpage')
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or $this->returnError('No results for LWNprev', 404);
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libxml_use_internal_errors(true);
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$html=DOMDocument::loadHTML($html);
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libxml_clear_errors();
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$cat1='';
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$cat2='';
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$realURI='https://lwn.net';
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foreach($html->getElementsByTagName('a') as $a){
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if($a->textContent==='Multi-page format'){
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break;
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}
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}
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$realURI.=$a->getAttribute('href');
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$URICounter=0;
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$edition=$html->getElementsByTagName('h1')->item(0)->textContent;
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$editionTimeStamp=strtotime(
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substr($edition,strpos($edition,'for ')+strlen('for '))
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);
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foreach($html->getElementsByTagName('h2') as $h2){
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if($h2->getAttribute('class')!=='SummaryHL'){
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continue;
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}
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$item = new \Item();
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$h2NextSibling=$h2->nextSibling;
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$this->jumpToNextTag($h2NextSibling);
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switch($h2NextSibling->getAttribute('class')){
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case 'FeatureByline':
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$item->name=$h2NextSibling->getElementsByTagName('b')->item(0)->textContent;
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break;
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case 'GAByline':
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$text=$h2NextSibling->textContent;
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$item->name=substr($text,strpos($text,'by '));
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break;
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default:
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$item->name='LWN';
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break;
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};
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$h2FirstChild=$h2->firstChild;
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$this->jumpToNextTag($h2FirstChild);
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if($h2FirstChild->tagName==='a'){
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$item->uri='https://lwn.net'.$h2FirstChild->getAttribute('href');
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}else{
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$item->uri=$realURI.'#'.$URICounter;
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}
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$URICounter++;
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$item->timestamp=$editionTimeStamp+$URICounter;
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$h2PrevSibling=$h2->previousSibling;
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$this->jumpToPreviousTag($h2PrevSibling);
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switch($h2PrevSibling->getAttribute('class')){
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case 'Cat2HL':
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$cat2=$h2PrevSibling->textContent;
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$h2PrevSibling=$h2PrevSibling->previousSibling;
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$this->jumpToPreviousTag($h2PrevSibling);
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if($h2PrevSibling->getAttribute('class')!=='Cat1HL'){
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break;
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}
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$cat1=$h2PrevSibling->textContent;
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break;
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case 'Cat1HL':
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$cat1=$h2PrevSibling->textContent;
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$cat2='';
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break;
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default:
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break;
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}
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$h2PrevSibling=null;
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$item->title='['.$cat1.($cat2?'/'.$cat2:'').'] '.$h2->textContent;
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$node=$h2;
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$content='';
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$contentEnd=false;
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while(!$contentEnd){
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$node=$node->nextSibling;
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if(
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!$node || (
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$node->nodeType!==XML_TEXT_NODE && (
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$node->tagName==='h2' ||
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in_array($node->getAttribute('class'),array('Cat1HL','Cat2HL'))
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)
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)
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){
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$contentEnd=true;
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}else{
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$content.=$node->C14N();
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}
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}
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$item->content=$content;
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$this->items[]=$item;
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}
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}
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public function getName(){
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return 'LWN Free Weekly Edition';
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}
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public function getURI(){
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return 'https://lwn.net/free/bigpage';
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}
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public function getCacheDuration(){
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return 604800; // one week
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}
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}
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