From dc6928316b0740cc359b94ce83040285c76d9dcd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pierre=20Mazi=C3=A8re?= <pierre.maziere@gmx.com>
Date: Sun, 19 Jun 2016 00:41:02 +0200
Subject: [PATCH] add bridge for LWN Free Weekly Edition
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Pierre Mazière <pierre.maziere@gmx.com>
---
bridges/LWNprevBridge.php | 156 ++++++++++++++++++++++++++++++++++++++
1 file changed, 156 insertions(+)
create mode 100644 bridges/LWNprevBridge.php
diff --git a/bridges/LWNprevBridge.php b/bridges/LWNprevBridge.php
new file mode 100644
index 00000000..54fb71db
--- /dev/null
+++ b/bridges/LWNprevBridge.php
@@ -0,0 +1,156 @@
+<?php
+/**
+* RssBridgeLWNprev
+*
+* @name LWNPrev Bridge
+* @description Returns the articles from the previous LWN.net edition
+ */
+class LWNprevBridge extends BridgeAbstract{
+ public function loadMetadatas() {
+
+ $this->maintainer = 'Pierre Mazière';
+ $this->name = 'LWN Free Weekly Edition';
+ $this->uri = 'https://lwn.net/free/bigpage';
+ $this->description = 'LWN Free Weekly Edition available one week late';
+ $this->update = '2016-19-01';
+
+ }
+
+ private function jumpToNextTag(&$node){
+ while($node && $node->nodeType===XML_TEXT_NODE){
+ $nextNode=$node->nextSibling;
+ if(!$nextNode){
+ break;
+ }
+ $node=$nextNode;
+ }
+ }
+
+ private function jumpToPreviousTag(&$node){
+ while($node && $node->nodeType===XML_TEXT_NODE){
+ $previousNode=$node->previousSibling;
+ if(!$previousNode){
+ break;
+ }
+ $node=$previousNode;
+ }
+ }
+
+ public function collectData(array $param){
+ // Because the LWN page is written in loose HTML and not XHTML,
+ // Simple HTML Dom is not accurate enough for the job
+ $html = advanced_file_get_contents('https://lwn.net/free/bigpage')
+ or $this->returnError('No results for LWNprev', 404);
+
+ libxml_use_internal_errors(true);
+ $html=DOMDocument::loadHTML($html);
+ libxml_clear_errors();
+
+ $cat1='';
+ $cat2='';
+
+ $realURI='https://lwn.net';
+ foreach($html->getElementsByTagName('a') as $a){
+ if($a->textContent==='Multi-page format'){
+ break;
+ }
+ }
+ $realURI.=$a->getAttribute('href');
+ $URICounter=0;
+
+ $edition=$html->getElementsByTagName('h1')->item(0)->textContent;
+ $editionTimeStamp=strtotime(
+ substr($edition,strpos($edition,'for ')+strlen('for '))
+ );
+
+ foreach($html->getElementsByTagName('h2') as $h2){
+ if($h2->getAttribute('class')!=='SummaryHL'){
+ continue;
+ }
+
+ $item = new \Item();
+
+ $h2NextSibling=$h2->nextSibling;
+ $this->jumpToNextTag($h2NextSibling);
+
+ switch($h2NextSibling->getAttribute('class')){
+ case 'FeatureByline':
+ $item->name=$h2NextSibling->getElementsByTagName('b')->item(0)->textContent;
+ break;
+ case 'GAByline':
+ $text=$h2NextSibling->textContent;
+ $item->name=substr($text,strpos($text,'by '));
+ break;
+ default:
+ $item->name='LWN';
+ break;
+ };
+
+ $h2FirstChild=$h2->firstChild;
+ $this->jumpToNextTag($h2FirstChild);
+ if($h2FirstChild->tagName==='a'){
+ $item->uri='https://lwn.net'.$h2FirstChild->getAttribute('href');
+ }else{
+ $item->uri=$realURI.'#'.$URICounter;
+ }
+ $URICounter++;
+
+ $item->timestamp=$editionTimeStamp+$URICounter;
+
+ $h2PrevSibling=$h2->previousSibling;
+ $this->jumpToPreviousTag($h2PrevSibling);
+ switch($h2PrevSibling->getAttribute('class')){
+ case 'Cat2HL':
+ $cat2=$h2PrevSibling->textContent;
+ $h2PrevSibling=$h2PrevSibling->previousSibling;
+ $this->jumpToPreviousTag($h2PrevSibling);
+ if($h2PrevSibling->getAttribute('class')!=='Cat1HL'){
+ break;
+ }
+ $cat1=$h2PrevSibling->textContent;
+ break;
+ case 'Cat1HL':
+ $cat1=$h2PrevSibling->textContent;
+ $cat2='';
+ break;
+ default:
+ break;
+ }
+ $h2PrevSibling=null;
+
+ $item->title='['.$cat1.($cat2?'/'.$cat2:'').'] '.$h2->textContent;
+ $node=$h2;
+ $content='';
+ $contentEnd=false;
+ while(!$contentEnd){
+ $node=$node->nextSibling;
+ if(
+ !$node || (
+ $node->nodeType!==XML_TEXT_NODE && (
+ $node->tagName==='h2' ||
+ in_array($node->getAttribute('class'),array('Cat1HL','Cat2HL'))
+ )
+ )
+ ){
+ $contentEnd=true;
+ }else{
+ $content.=$node->C14N();
+ }
+ }
+ $item->content=$content;
+ $this->items[]=$item;
+ }
+ }
+
+ public function getName(){
+ return 'LWN Free Weekly Edition';
+ }
+
+ public function getURI(){
+ return 'https://lwn.net/free/bigpage';
+ }
+
+ public function getCacheDuration(){
+ return 604800; // one week
+ }
+}