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authorJohannes 'josch' Schauer <josch@debian.org>2019-09-24 22:51:24 +0200
committerJohannes 'josch' Schauer <josch@debian.org>2019-09-24 22:51:24 +0200
commit8702184834089fd80a0caedd34297f834e716f52 (patch)
tree462095b3c147cb2a56ac5f1f42ce3d4e8b6839e2 /bridges/LWNprevBridge.php
Import Upstream version 2019-01-13
Diffstat (limited to 'bridges/LWNprevBridge.php')
-rw-r--r--bridges/LWNprevBridge.php265
1 files changed, 265 insertions, 0 deletions
diff --git a/bridges/LWNprevBridge.php b/bridges/LWNprevBridge.php
new file mode 100644
index 0000000..baa30c9
--- /dev/null
+++ b/bridges/LWNprevBridge.php
@@ -0,0 +1,265 @@
+<?php
+class LWNprevBridge extends BridgeAbstract{
+ const MAINTAINER = 'Pierre Mazière';
+ const NAME = 'LWN Free Weekly Edition';
+ const URI = 'https://lwn.net/';
+ const CACHE_TIMEOUT = 604800; // 1 week
+ const DESCRIPTION = 'LWN Free Weekly Edition available one week late';
+
+ private $editionTimeStamp;
+
+ function getURI(){
+ return self::URI . 'free/bigpage';
+ }
+
+ private function jumpToNextTag(&$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(){
+ // Because the LWN page is written in loose HTML and not XHTML,
+ // Simple HTML Dom is not accurate enough for the job
+ $content = getContents($this->getURI())
+ or returnServerError('No results for LWNprev');
+
+ $contents = explode('<b>Page editor</b>', $content);
+
+ foreach($contents as $content) {
+ if(strpos($content, '<html>') === false) {
+ $content = <<<EOD
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html><head><title>LWN</title></head><body>{$content}</body></html>
+EOD;
+ } else {
+ $content = $content . '</body></html>';
+ }
+
+ libxml_use_internal_errors(true);
+ $html = new DOMDocument();
+ $html->loadHTML($content);
+ libxml_clear_errors();
+
+ $edition = $html->getElementsByTagName('h1');
+ if($edition->length !== 0) {
+ $text = $edition->item(0)->textContent;
+ $this->editionTimeStamp = strtotime(
+ substr($text, strpos($text, 'for ') + strlen('for '))
+ );
+ }
+
+ if(strpos($content, 'Cat1HL') === false) {
+ $items = $this->getFeatureContents($html);
+ } elseif(strpos($content, 'Cat3HL') === false) {
+ $items = $this->getBriefItems($html);
+ } else {
+ $items = $this->getAnnouncements($html);
+ }
+
+ $this->items = array_merge($this->items, $items);
+ }
+ }
+
+ private function getArticleContent(&$title){
+ $link = $title->firstChild;
+ $this->jumpToNextTag($link);
+ $item['uri'] = self::URI;
+ if($link->nodeName === 'a') {
+ $item['uri'] .= $link->getAttribute('href');
+ }
+
+ $item['timestamp'] = $this->editionTimeStamp;
+
+ $node = $title;
+ $content = '';
+ $contentEnd = false;
+ while(!$contentEnd) {
+ $node = $node->nextSibling;
+ if(!$node || (
+ $node->nodeType !== XML_TEXT_NODE &&
+ $node->nodeName === 'h2' || (
+ !is_null($node->attributes) &&
+ !is_null($class = $node->attributes->getNamedItem('class')) &&
+ in_array($class->nodeValue, array('Cat1HL','Cat2HL'))
+ )
+ )
+ ) {
+ $contentEnd = true;
+ } else {
+ $content .= $node->C14N();
+ }
+ }
+ $item['content'] = $content;
+ return $item;
+ }
+
+ private function getFeatureContents(&$html){
+ $items = array();
+ foreach($html->getElementsByTagName('h2') as $title) {
+ if($title->getAttribute('class') !== 'SummaryHL') {
+ continue;
+ }
+
+ $item = array();
+
+ $author = $title->nextSibling;
+ $this->jumpToNextTag($author);
+ if($author->getAttribute('class') === 'FeatureByline') {
+ $item['author'] = $author->getElementsByTagName('b')->item(0)->textContent;
+ } else {
+ continue;
+ }
+
+ $item['title'] = $title->textContent;
+
+ $items[] = array_merge($item, $this->getArticleContent($title));
+ }
+ return $items;
+ }
+
+ private function getItemPrefix(&$cat, &$cats){
+ $cat1 = '';
+ $cat2 = '';
+ $cat3 = '';
+ switch($cat->getAttribute('class')) {
+ case 'Cat3HL':
+ $cat3 = $cat->textContent;
+ $cat = $cat->previousSibling;
+ $this->jumpToPreviousTag($cat);
+ $cats[2] = $cat3;
+ if($cat->getAttribute('class') !== 'Cat2HL') {
+ break;
+ }
+ case 'Cat2HL':
+ $cat2 = $cat->textContent;
+ $cat = $cat->previousSibling;
+ $this->jumpToPreviousTag($cat);
+ $cats[1] = $cat2;
+ if(empty($cat3)) {
+ $cats[2] = '';
+ }
+ if($cat->getAttribute('class') !== 'Cat1HL') {
+ break;
+ }
+ case 'Cat1HL':
+ $cat1 = $cat->textContent;
+ $cats[0] = $cat1;
+ if(empty($cat3)) {
+ $cats[2] = '';
+ }
+ if(empty($cat2)) {
+ $cats[1] = '';
+ }
+ break;
+ default:
+ break;
+ }
+
+ $prefix = '';
+ if(!empty($cats[0])) {
+ $prefix .= '[' . $cats[0] . ($cats[1] ? '/' . $cats[1] : '') . '] ';
+ }
+ return $prefix;
+ }
+
+ private function getAnnouncements(&$html){
+ $items = array();
+ $cats = array('','','');
+
+ foreach($html->getElementsByTagName('p') as $newsletters) {
+ if($newsletters->getAttribute('class') !== 'Cat3HL') {
+ continue;
+ }
+
+ $item = array();
+
+ $item['uri'] = self::URI . '#' . count($items);
+
+ $item['timestamp'] = $this->editionTimeStamp;
+
+ $item['author'] = 'LWN';
+
+ $cat = $newsletters->previousSibling;
+ $this->jumpToPreviousTag($cat);
+ $prefix = $this->getItemPrefix($cat, $cats);
+ $item['title'] = $prefix . ' ' . $newsletters->textContent;
+
+ $node = $newsletters;
+ $content = '';
+ $contentEnd = false;
+ while(!$contentEnd) {
+ $node = $node->nextSibling;
+ if(!$node || (
+ $node->nodeType !== XML_TEXT_NODE && (
+ !is_null($node->attributes) &&
+ !is_null($class = $node->attributes->getNamedItem('class')) &&
+ in_array($class->nodeValue, array('Cat1HL','Cat2HL','Cat3HL'))
+ )
+ )
+ ) {
+ $contentEnd = true;
+ } else {
+ $content .= $node->C14N();
+ }
+ }
+ $item['content'] = $content;
+ $items[] = $item;
+ }
+
+ foreach($html->getElementsByTagName('h2') as $title) {
+ if($title->getAttribute('class') !== 'SummaryHL') {
+ continue;
+ }
+
+ $item = array();
+
+ $cat = $title->previousSibling;
+ $this->jumpToPreviousTag($cat);
+ $cat = $cat->previousSibling;
+ $this->jumpToPreviousTag($cat);
+ $prefix = $this->getItemPrefix($cat, $cats);
+ $item['title'] = $prefix . ' ' . $title->textContent;
+ $items[] = array_merge($item, $this->getArticleContent($title));
+ }
+
+ return $items;
+ }
+
+ private function getBriefItems(&$html){
+ $items = array();
+ $cats = array('','','');
+ foreach($html->getElementsByTagName('h2') as $title) {
+ if($title->getAttribute('class') !== 'SummaryHL') {
+ continue;
+ }
+
+ $item = array();
+
+ $cat = $title->previousSibling;
+ $this->jumpToPreviousTag($cat);
+ $cat = $cat->previousSibling;
+ $this->jumpToPreviousTag($cat);
+ $prefix = $this->getItemPrefix($cat, $cats);
+ $item['title'] = $prefix . ' ' . $title->textContent;
+ $items[] = array_merge($item, $this->getArticleContent($title));
+ }
+
+ return $items;
+ }
+}
+?>
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 11:16:32 +0000