forked from blallo/rss-bridge
147 lines
3.9 KiB
PHP
147 lines
3.9 KiB
PHP
<?php
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class LWNprevBridge extends BridgeAbstract{
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public $maintainer = 'Pierre Mazière';
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public $name = 'LWN Free Weekly Edition';
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public $uri = 'https://lwn.net/';
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public $description = 'LWN Free Weekly Edition available one week late';
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function getURI(){
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return $this->uri.'free/bigpage';
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}
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private function jumpToNextTag(&$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(){
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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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$content=$this->getContents($this->getURI())
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or $this->returnServerError('No results for LWNprev');
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libxml_use_internal_errors(true);
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$html=new DOMDocument();
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$html->loadHTML($content);
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libxml_clear_errors();
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$cat1='';
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$cat2='';
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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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$realURI=$this->uri.$a->getAttribute('href');
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$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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$item = array();
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$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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$item['author']=$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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$item['author']=substr($text,strpos($text,'by '));
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break;
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default:
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$item['author']='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($h2FirstChild->nodeName==='a'){
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$item['uri']=$this->uri.$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']='';
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if(!empty($cat1)){
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$item['title'].='['.$cat1.($cat2?'/'.$cat2:'').'] ';
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}
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$item['title'].=$h2->textContent;
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$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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$node->nodeName==='h2' ||
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(!is_null($node->attributes) && !is_null($class=$node->attributes->getNamedItem('class')) &&
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in_array($class->nodeValue,array('Cat1HL','Cat2HL')))
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)
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)
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){
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$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 getCacheDuration(){
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return 604800; // one week
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}
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}
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