forked from blallo/rss-bridge
304 lines
8.5 KiB
PHP
304 lines
8.5 KiB
PHP
<?php
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define('WIKIPEDIA_SUBJECT_TFA', 0); // Today's featured article
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define('WIKIPEDIA_SUBJECT_DYK', 1); // Did you know...
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class WikipediaBridge extends BridgeAbstract {
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const MAINTAINER = 'logmanoriginal';
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const NAME = 'Wikipedia bridge for many languages';
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const URI = 'https://www.wikipedia.org/';
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const DESCRIPTION = 'Returns articles for a language of your choice';
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const PARAMETERS = array( array(
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'language' => array(
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'name' => 'Language',
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'type' => 'list',
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'required' => true,
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'title' => 'Select your language',
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'exampleValue' => 'English',
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'values' => array(
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'English' => 'en',
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'Dutch' => 'nl',
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'Esperanto' => 'eo',
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'French' => 'fr',
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'German' => 'de',
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)
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),
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'subject' => array(
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'name' => 'Subject',
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'type' => 'list',
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'required' => true,
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'title' => 'What subject are you interested in?',
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'exampleValue' => 'Today\'s featured article',
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'values' => array(
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'Today\'s featured article' => 'tfa',
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'Did you know…' => 'dyk'
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)
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),
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'fullarticle' => array(
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'name' => 'Load full article',
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'type' => 'checkbox',
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'title' => 'Activate to always load the full article'
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)
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));
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public function getURI(){
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if(!is_null($this->getInput('language'))){
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return 'https://'
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. strtolower($this->getInput('language'))
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. '.wikipedia.org';
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}
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return parent::getURI();
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}
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public function getName(){
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switch($this->getInput('subject')){
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case 'tfa':
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$subject = WIKIPEDIA_SUBJECT_TFA;
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break;
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case 'dyk':
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$subject = WIKIPEDIA_SUBJECT_DYK;
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break;
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default: return parent::getName();
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}
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switch($subject){
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case WIKIPEDIA_SUBJECT_TFA:
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$name = 'Today\'s featured article from '
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. strtolower($this->getInput('language'))
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. '.wikipedia.org';
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break;
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case WIKIPEDIA_SUBJECT_DYK:
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$name = 'Did you know? - articles from '
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. strtolower($this->getInput('language'))
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. '.wikipedia.org';
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break;
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default:
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$name = 'Articles from '
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. strtolower($this->getInput('language'))
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. '.wikipedia.org';
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break;
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}
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return $name;
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}
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public function collectData(){
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switch($this->getInput('subject')){
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case 'tfa':
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$subject = WIKIPEDIA_SUBJECT_TFA;
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break;
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case 'dyk':
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$subject = WIKIPEDIA_SUBJECT_DYK;
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break;
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default:
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$subject = WIKIPEDIA_SUBJECT_TFA;
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break;
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}
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$fullArticle = $this->getInput('fullarticle');
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// This will automatically send us to the correct main page in any language (try it!)
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$html = getSimpleHTMLDOM($this->getURI() . '/wiki');
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if(!$html)
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returnServerError('Could not load site: ' . $this->getURI() . '!');
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/*
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* Now read content depending on the language (make sure to create one function per language!)
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* We build the function name automatically, just make sure you create a private function ending
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* with your desired language code, where the language code is upper case! (en -> getContentsEN).
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*/
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$function = 'getContents' . ucfirst(strtolower($this->getInput('language')));
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if(!method_exists($this, $function))
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returnServerError('A function to get the contents for your language is missing (\'' . $function . '\')!');
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/*
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* The method takes care of creating all items.
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*/
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$this->$function($html, $subject, $fullArticle);
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}
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/**
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* Replaces all relative URIs with absolute ones
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* @param $element A simplehtmldom element
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* @return The $element->innertext with all URIs replaced
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*/
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private function replaceUriInHtmlElement($element){
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return str_replace('href="/', 'href="' . $this->getURI() . '/', $element->innertext);
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}
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/*
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* Adds a new item to $items using a generic operation (should work for most
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* (all?) wikis) $anchorText can be specified if the wiki in question doesn't
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* use '...' (like Dutch, French and Italian) $anchorFallbackIndex can be
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* used to specify a different fallback link than the first
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* (e.g., -1 for the last)
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*/
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private function addTodaysFeaturedArticleGeneric($element,
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$fullArticle,
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$anchorText = '...',
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$anchorFallbackIndex = 0){
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// Clean the bottom of the featured article
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if ($element->find('div', -1))
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$element->find('div', -1)->outertext = '';
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// The title and URI of the article can be found in an anchor containing
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// the string '...' in most wikis ('full article ...')
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$target = $element->find('p/a', $anchorFallbackIndex);
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foreach($element->find('//a') as $anchor){
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if(strpos($anchor->innertext, $anchorText) !== false){
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$target = $anchor;
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break;
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}
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}
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$item = array();
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$item['uri'] = $this->getURI() . $target->href;
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$item['title'] = $target->title;
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if(!$fullArticle)
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$item['content'] = strip_tags($this->replaceUriInHtmlElement($element), '<a><p><br><img>');
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else
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$item['content'] = $this->loadFullArticle($item['uri']);
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$this->items[] = $item;
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}
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/*
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* Adds a new item to $items using a generic operation (should work for most (all?) wikis)
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*/
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private function addDidYouKnowGeneric($element, $fullArticle){
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foreach($element->find('ul', 0)->find('li') as $entry){
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$item = array();
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// We can only use the first anchor, there is no way of finding the 'correct' one if there are multiple
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$item['uri'] = $this->getURI() . $entry->find('a', 0)->href;
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$item['title'] = strip_tags($entry->innertext);
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if(!$fullArticle)
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$item['content'] = $this->replaceUriInHtmlElement($entry);
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else
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$item['content'] = $this->loadFullArticle($item['uri']);
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$this->items[] = $item;
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}
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}
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/**
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* Loads the full article from a given URI
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*/
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private function loadFullArticle($uri){
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$content_html = getSimpleHTMLDOMCached($uri);
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if(!$content_html)
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returnServerError('Could not load site: ' . $uri . '!');
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$content = $content_html->find('#mw-content-text', 0);
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if(!$content)
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returnServerError('Could not find content in page: ' . $uri . '!');
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// Let's remove a couple of things from the article
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$table = $content->find('#toc', 0); // Table of contents
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if(!$table === false)
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$table->outertext = '';
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foreach($content->find('ol.references') as $reference) // References
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$reference->outertext = '';
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return str_replace('href="/', 'href="' . $this->getURI() . '/', $content->innertext);
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}
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/**
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* Implementation for de.wikipedia.org
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*/
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private function getContentsDe($html, $subject, $fullArticle){
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switch($subject){
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case WIKIPEDIA_SUBJECT_TFA:
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$element = $html->find('div[id=mf-tfa]', 0);
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$this->addTodaysFeaturedArticleGeneric($element, $fullArticle);
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break;
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case WIKIPEDIA_SUBJECT_DYK:
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$element = $html->find('div[id=mf-dyk]', 0);
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$this->addDidYouKnowGeneric($element, $fullArticle);
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break;
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default:
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break;
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}
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}
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/**
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* Implementation for fr.wikipedia.org
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*/
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private function getContentsFr($html, $subject, $fullArticle){
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switch($subject){
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case WIKIPEDIA_SUBJECT_TFA:
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$element = $html->find('div[id=accueil-lumieresur]', 0);
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$this->addTodaysFeaturedArticleGeneric($element, $fullArticle, 'Lire la suite');
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break;
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case WIKIPEDIA_SUBJECT_DYK:
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$element = $html->find('div[id=SaviezVous]', 0);
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$this->addDidYouKnowGeneric($element, $fullArticle);
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break;
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default:
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break;
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}
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}
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/**
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* Implementation for en.wikipedia.org
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*/
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private function getContentsEn($html, $subject, $fullArticle){
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switch($subject){
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case WIKIPEDIA_SUBJECT_TFA:
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$element = $html->find('div[id=mp-tfa]', 0);
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$this->addTodaysFeaturedArticleGeneric($element, $fullArticle);
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break;
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case WIKIPEDIA_SUBJECT_DYK:
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$element = $html->find('div[id=mp-dyk]', 0);
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$this->addDidYouKnowGeneric($element, $fullArticle);
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break;
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default:
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break;
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}
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}
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/**
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* Implementation for eo.wikipedia.org
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*/
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private function getContentsEo($html, $subject, $fullArticle){
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switch($subject){
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case WIKIPEDIA_SUBJECT_TFA:
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$element = $html->find('div[id=mf-artikolo-de-la-semajno]', 0);
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$this->addTodaysFeaturedArticleGeneric($element, $fullArticle);
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break;
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case WIKIPEDIA_SUBJECT_DYK:
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$element = $html->find('div[id=mw-content-text]', 0)->find('table', 4)->find('td', 4);
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$this->addDidYouKnowGeneric($element, $fullArticle);
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break;
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default:
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break;
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}
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}
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/**
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* Implementation for nl.wikipedia.org
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*/
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private function getContentsNl($html, $subject, $fullArticle){
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switch($subject){
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case WIKIPEDIA_SUBJECT_TFA:
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$element = $html->find('div[id=mf-uitgelicht]', 0);
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$this->addTodaysFeaturedArticleGeneric($element, $fullArticle, 'Lees meer');
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break;
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case WIKIPEDIA_SUBJECT_DYK:
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$element = $html->find('div[id=mw-content-text]', 0)->find('table', 4)->find('td', 2);
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$this->addDidYouKnowGeneric($element, $fullArticle);
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break;
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default:
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break;
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}
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}
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}
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