rss-bridge/bridges/WikipediaBridge.php
Dag 95c199c2eb
fix: various php notices (#3145)
* fix: notice

* fix: Trying to get property content of non-object at bridges/PcGamerBridge.php line 36

* fix: better exception message

* fix: strpos(): Non-string needles will be interpreted as strings in the future. Use an explicit chr() call to preserve the current behavior
2022-11-15 00:30:51 +01:00

349 lines
11 KiB
PHP

<?php
define('WIKIPEDIA_SUBJECT_TFA', 0); // Today's featured article
define('WIKIPEDIA_SUBJECT_DYK', 1); // Did you know...
class WikipediaBridge extends BridgeAbstract
{
const MAINTAINER = 'logmanoriginal';
const NAME = 'Wikipedia bridge for many languages';
const URI = 'https://www.wikipedia.org/';
const DESCRIPTION = 'Returns articles for a language of your choice';
const PARAMETERS = [ [
'language' => [
'name' => 'Language',
'type' => 'list',
'title' => 'Select your language',
'exampleValue' => 'English',
'values' => [
'English' => 'en',
'Русский' => 'ru',
'Dutch' => 'nl',
'Esperanto' => 'eo',
'French' => 'fr',
'German' => 'de',
]
],
'subject' => [
'name' => 'Subject',
'type' => 'list',
'title' => 'What subject are you interested in?',
'exampleValue' => 'Today\'s featured article',
'values' => [
'Today\'s featured article' => 'tfa',
'Did you know…' => 'dyk'
]
],
'fullarticle' => [
'name' => 'Load full article',
'type' => 'checkbox',
'title' => 'Activate to always load the full article'
]
]];
public function getURI()
{
if (!is_null($this->getInput('language'))) {
return 'https://'
. strtolower($this->getInput('language'))
. '.wikipedia.org';
}
return parent::getURI();
}
public function getName()
{
switch ($this->getInput('subject')) {
case 'tfa':
$subject = WIKIPEDIA_SUBJECT_TFA;
break;
case 'dyk':
$subject = WIKIPEDIA_SUBJECT_DYK;
break;
default:
return parent::getName();
}
switch ($subject) {
case WIKIPEDIA_SUBJECT_TFA:
$name = 'Today\'s featured article from '
. strtolower($this->getInput('language'))
. '.wikipedia.org';
break;
case WIKIPEDIA_SUBJECT_DYK:
$name = 'Did you know? - articles from '
. strtolower($this->getInput('language'))
. '.wikipedia.org';
break;
default:
$name = 'Articles from '
. strtolower($this->getInput('language'))
. '.wikipedia.org';
break;
}
return $name;
}
public function collectData()
{
switch ($this->getInput('subject')) {
case 'tfa':
$subject = WIKIPEDIA_SUBJECT_TFA;
break;
case 'dyk':
$subject = WIKIPEDIA_SUBJECT_DYK;
break;
default:
$subject = WIKIPEDIA_SUBJECT_TFA;
break;
}
$fullArticle = $this->getInput('fullarticle');
// This will automatically send us to the correct main page in any language (try it!)
$html = getSimpleHTMLDOM($this->getURI() . '/wiki');
if (!$html) {
returnServerError('Could not load site: ' . $this->getURI() . '!');
}
/*
* Now read content depending on the language (make sure to create one function per language!)
* We build the function name automatically, just make sure you create a private function ending
* with your desired language code, where the language code is upper case! (en -> getContentsEN).
*/
$function = 'getContents' . ucfirst(strtolower($this->getInput('language')));
if (!method_exists($this, $function)) {
returnServerError('A function to get the contents for your language is missing (\'' . $function . '\')!');
}
/*
* The method takes care of creating all items.
*/
$this->$function($html, $subject, $fullArticle);
}
/**
* Replaces all relative URIs with absolute ones
* @param $element A simplehtmldom element
* @return The $element->innertext with all URIs replaced
*/
private function replaceUriInHtmlElement($element)
{
return str_replace('href="/', 'href="' . $this->getURI() . '/', $element->innertext);
}
/*
* Adds a new item to $items using a generic operation (should work for most
* (all?) wikis) $anchorText can be specified if the wiki in question doesn't
* use '...' (like Dutch, French and Italian) $anchorFallbackIndex can be
* used to specify a different fallback link than the first
* (e.g., -1 for the last)
*/
private function addTodaysFeaturedArticleGeneric(
$element,
$fullArticle,
$anchorText = '...',
$anchorFallbackIndex = 0
) {
// Clean the bottom of the featured article
if ($element->find('ul', -1)) {
$element->find('ul', -1)->outertext = '';
} elseif ($element->find('div', -1)) {
$element->find('div', -1)->outertext = '';
}
// The title and URI of the article can be found in an anchor containing
// the string '...' in most wikis ('full article ...')
$target = $element->find('p a', $anchorFallbackIndex);
foreach ($element->find('//a') as $anchor) {
if (strpos($anchor->innertext, $anchorText) !== false) {
$target = $anchor;
break;
}
}
$item = [];
$item['uri'] = $this->getURI() . $target->href;
$item['title'] = $target->title;
if (!$fullArticle) {
$item['content'] = strip_tags($this->replaceUriInHtmlElement($element), '<a><p><br><img>');
} else {
$item['content'] = $this->loadFullArticle($item['uri']);
}
$this->items[] = $item;
}
/*
* Adds a new item to $items using a generic operation (should work for most (all?) wikis)
*/
private function addDidYouKnowGeneric($element, $fullArticle)
{
foreach ($element->find('ul', 0)->find('li') as $entry) {
$item = [];
// We can only use the first anchor, there is no way of finding the 'correct' one if there are multiple
$item['uri'] = $this->getURI() . $entry->find('a', 0)->href;
$item['title'] = strip_tags($entry->innertext);
if (!$fullArticle) {
$item['content'] = $this->replaceUriInHtmlElement($entry);
} else {
$item['content'] = $this->loadFullArticle($item['uri']);
}
$this->items[] = $item;
}
}
/**
* Loads the full article from a given URI
*/
private function loadFullArticle($uri)
{
$content_html = getSimpleHTMLDOMCached($uri);
if (!$content_html) {
returnServerError('Could not load site: ' . $uri . '!');
}
$content = $content_html->find('#mw-content-text', 0);
if (!$content) {
returnServerError('Could not find content in page: ' . $uri . '!');
}
// Let's remove a couple of things from the article
$table = $content->find('#toc', 0); // Table of contents
if (!$table === false) {
$table->outertext = '';
}
foreach ($content->find('ol.references') as $reference) { // References
$reference->outertext = '';
}
return str_replace('href="/', 'href="' . $this->getURI() . '/', $content->innertext);
}
/**
* Implementation for de.wikipedia.org
*/
private function getContentsDe($html, $subject, $fullArticle)
{
switch ($subject) {
case WIKIPEDIA_SUBJECT_TFA:
$element = $html->find('div[id=artikel] div.hauptseite-box-content', 0);
$this->addTodaysFeaturedArticleGeneric($element, $fullArticle);
break;
case WIKIPEDIA_SUBJECT_DYK:
$element = $html->find('div[id=wissenswertes]', 0);
$this->addDidYouKnowGeneric($element, $fullArticle);
break;
default:
break;
}
}
/**
* Implementation for fr.wikipedia.org
*/
private function getContentsFr($html, $subject, $fullArticle)
{
switch ($subject) {
case WIKIPEDIA_SUBJECT_TFA:
$element = $html->find('div[class=accueil_2017_cadre]', 0);
$this->addTodaysFeaturedArticleGeneric($element, $fullArticle, 'Lire la suite');
break;
case WIKIPEDIA_SUBJECT_DYK:
$element = $html->find('div[class=accueil_2017_cadre]', 2);
$this->addDidYouKnowGeneric($element, $fullArticle);
break;
default:
break;
}
}
/**
* Implementation for en.wikipedia.org
*/
private function getContentsEn($html, $subject, $fullArticle)
{
switch ($subject) {
case WIKIPEDIA_SUBJECT_TFA:
$element = $html->find('div[id=mp-tfa]', 0);
$this->addTodaysFeaturedArticleGeneric($element, $fullArticle, '...', -1);
break;
case WIKIPEDIA_SUBJECT_DYK:
$element = $html->find('div[id=mp-dyk]', 0);
$this->addDidYouKnowGeneric($element, $fullArticle);
break;
default:
break;
}
}
/**
* Implementation for ru.wikipedia.org
*/
private function getContentsRu($html, $subject, $fullArticle)
{
switch ($subject) {
case WIKIPEDIA_SUBJECT_TFA:
$element = $html->find('div[id=main-tfa]', 0);
$this->addTodaysFeaturedArticleGeneric($element, $fullArticle, '...', -1);
break;
case WIKIPEDIA_SUBJECT_DYK:
$element = $html->find('div[id=main-dyk]', 0);
$this->addDidYouKnowGeneric($element, $fullArticle);
break;
default:
break;
}
}
/**
* Implementation for eo.wikipedia.org
*/
private function getContentsEo($html, $subject, $fullArticle)
{
switch ($subject) {
case WIKIPEDIA_SUBJECT_TFA:
$element = $html->find('div[id=mf-artikolo-de-la-monato]', 0);
$element->find('div', -2)->outertext = '';
$this->addTodaysFeaturedArticleGeneric($element, $fullArticle);
break;
case WIKIPEDIA_SUBJECT_DYK:
$element = $html->find('div.hp', 1)->find('table', 4)->find('td', -1);
$this->addDidYouKnowGeneric($element, $fullArticle);
break;
default:
break;
}
}
/**
* Implementation for nl.wikipedia.org
*/
private function getContentsNl($html, $subject, $fullArticle)
{
switch ($subject) {
case WIKIPEDIA_SUBJECT_TFA:
$element = $html->find('td[id=segment-Uitgelicht] div', 0);
$element->find('p', 1)->outertext = '';
$this->addTodaysFeaturedArticleGeneric($element, $fullArticle, 'Lees verder');
break;
case WIKIPEDIA_SUBJECT_DYK:
$element = $html->find('td[id=segment-Wist_je_dat] div', 0);
$this->addDidYouKnowGeneric($element, $fullArticle);
break;
default:
break;
}
}
}