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rss-bridge/bridges/EconomistBridge.php

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<?php
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class EconomistBridge extends FeedExpander
{
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const MAINTAINER = 'bockiii, sqrtminusone';
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const NAME = 'Economist Bridge';
const URI = 'https://www.economist.com/';
const CACHE_TIMEOUT = 3600; //1hour
const DESCRIPTION = 'Returns the latest articles for the selected category';
const CONFIGURATION = [
'cookie' => [
'required' => false,
]
];
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const PARAMETERS = [
'global' => [
'limit' => [
'name' => 'Feed Item Limit',
'required' => true,
'type' => 'number',
'defaultValue' => 10,
'title' => 'Maximum number of returned feed items. Maximum 30, default 10'
]
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],
'Topics' => [
'topic' => [
'name' => 'Topics',
'type' => 'list',
'title' => 'Select a Topic',
'defaultValue' => 'latest',
'values' => [
'Latest' => 'latest',
'The world this week' => 'the-world-this-week',
'Letters' => 'letters',
'Leaders' => 'leaders',
'Briefings' => 'briefing',
'Special reports' => 'special-report',
'Britain' => 'britain',
'Europe' => 'europe',
'United States' => 'united-states',
'The Americas' => 'the-americas',
'Middle East and Africa' => 'middle-east-and-africa',
'Asia' => 'asia',
'China' => 'china',
'International' => 'international',
'Business' => 'business',
'Finance and economics' => 'finance-and-economics',
'Science and technology' => 'science-and-technology',
'Books and arts' => 'books-and-arts',
'Obituaries' => 'obituary',
'Graphic detail' => 'graphic-detail',
'Indicators' => 'economic-and-financial-indicators',
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'The Economist Reads' => 'the-economist-reads',
]
]
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],
'Blogs' => [
'blog' => [
'name' => 'Blogs',
'type' => 'list',
'title' => 'Select a Blog',
'values' => [
'Bagehots notebook' => 'bagehots-notebook',
'Bartleby' => 'bartleby',
'Buttonwoods notebook' => 'buttonwoods-notebook',
'Charlemagnes notebook' => 'charlemagnes-notebook',
'Democracy in America' => 'democracy-in-america',
'Erasmus' => 'erasmus',
'Free exchange' => 'free-exchange',
'Game theory' => 'game-theory',
'Gulliver' => 'gulliver',
'Kaffeeklatsch' => 'kaffeeklatsch',
'Prospero' => 'prospero',
'The Economist Explains' => 'the-economist-explains',
]
]
]
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];
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public function collectData()
{
// get if topics or blogs were selected and store the selected category
switch ($this->queriedContext) {
case 'Topics':
$category = $this->getInput('topic');
break;
case 'Blogs':
$category = $this->getInput('blog');
break;
default:
$category = 'latest';
}
// limit the returned articles to 30 at max
if ((int)$this->getInput('limit') <= 30) {
$limit = (int)$this->getInput('limit');
} else {
$limit = 30;
}
$url = 'https://www.economist.com/' . $category . '/rss.xml';
$this->collectExpandableDatas($url, $limit);
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}
protected function parseItem(array $item)
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{
$headers = [];
if ($this->getOption('cookie')) {
$headers = [
'Authority: www.economist.com',
'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7',
'Accept-language: en-US,en;q=0.9',
'Cache-control: max-age=0',
'Cookie: ' . $this->getOption('cookie'),
'Upgrade-insecure-requests: 1',
'User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36'
];
}
try {
$dom = getSimpleHTMLDOM($item['uri'], $headers);
} catch (Exception $e) {
$item['content'] = $e->getMessage();
return $item;
}
$article = $dom->find('#new-article-template', 0);
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if ($article == null) {
$article = $dom->find('main', 0);
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}
if ($article) {
$elem = $article->find('div', 0);
list($content, $audio_url) = $this->processContent($dom, $elem);
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$item['content'] = $content;
if ($audio_url != null) {
$item['enclosures'] = [$audio_url];
}
}
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return $item;
}
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private function processContent($html, $elem)
{
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// Remove extra styles
$styles = $elem->find('style');
foreach ($styles as $style) {
$style->parent->removeChild($style);
}
// Remove the section with remaining articles
$more_elem = $elem->find('h2.ds-section-headline.ds-section-headline--rule-emphasised', 0);
if ($more_elem != null) {
if ($more_elem->parent && $more_elem->parent->parent) {
$more_elem->parent->parent->removeChild($more_elem->parent);
}
}
// Remove 'capitalization' with <small> tags
foreach ($elem->find('small') as $small) {
$small->outertext = strtoupper($small->innertext);
}
// Extract audio
$audio_url = null;
$audio_elem = $elem->find('#audio-player', 0);
if ($audio_elem != null) {
$audio_url = $audio_elem->src;
$audio_elem->parent->parent->removeChild($audio_elem->parent);
}
// No idea how this works on the original site
foreach ($elem->find('img') as $img) {
$img->removeAttribute('width');
$img->removeAttribute('height');
}
// Some hacks for 'interactive' sections to make them a bit
// more readable. Here's one example:
// https://www.economist.com/interactive/briefing/2022/09/24/war-in-ukraine-has-reshaped-worlds-fuel-markets
$svelte = $elem->find('svelte-scroller-outer', 0);
if ($svelte != null) {
$svelte->parent->removeChild($svelte);
}
foreach ($elem->find('img') as $strange_img) {
if (!str_contains($strange_img->src, 'economist.com')) {
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$strange_img->src = 'https://economist.com' . $strange_img->src;
}
}
// Trying to fix interactive infographics. This doesn't look
// quite as well, but fortunately, such elements are rare
// (~95% of infographics are plain images)
foreach ($elem->find('div.ds-image') as $ds_img) {
$ds_img->style = 'max-width: min(100%, 700px); overflow: hidden; margin: 2rem auto;';
$g_artboard = null;
foreach ($ds_img->find('div.g-artboard') as $g_artboard_cand) {
if (!str_contains($g_artboard_cand->style, 'display: none')) {
$g_artboard = $g_artboard_cand;
}
}
if ($g_artboard != null) {
$g_artboard->style = $g_artboard->style . 'position: relative;';
$img = $g_artboard->find('img', 0);
if ($img != null) {
$img->style = 'top: 0; display: block; width: 100% !important;';
foreach ($g_artboard->find('div') as $div) {
if ($div->style == null) {
$div->style = 'position: absolute;';
} else {
$div->style = $div->style . 'position: absolute';
}
}
}
}
}
$vertical = $elem->find('div[data-test-id=vertical]', 0);
if ($vertical != null) {
$vertical->parent->removeChild($vertical);
}
// Section with 'Save', 'Share' and 'Give buttons'
foreach ($elem->find('div[data-test-id=sharing-modal]') as $sharing) {
$sharing->parent->removeChild($sharing);
}
// These links become HUGE without <style> tags and aren't
// particularly useful anyhow
foreach ($elem->find('a.ds-link-with-arrow-icon') as $a) {
$a->parent->removeChild($a);
}
// Sections like "Leaders on day X"
foreach ($elem->find('div[data-tracking-id=content-well-chapter-list]') as $div) {
$div->parent->removeChild($div);
}
// "Explore more" section
foreach ($elem->find('h3[id=article-tags]') as $h3) {
$div = $h3->parent;
$div->parent->removeChild($div);
}
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// The Economist puts infographics into iframes, which doesn't
// work in any of my readers. So this replaces iframes with
// links.
foreach ($elem->find('iframe') as $iframe) {
$a = $html->createElement('a');
$a->href = $iframe->src;
$a->innertext = $iframe->src;
$iframe->parent->appendChild($a);
$iframe->parent->removeChild($iframe);
}
// Using <section> tags does nothing except interfering with
// rss-bridge styles, so this replaces them with <div>
$res = $elem->innertext;
$res = str_replace('<section', '<div', $res);
$res = str_replace('</section', '</div', $res);
$content = '<div>' . $res . '</div>';
return [$content, $audio_url];
}
}