rss-bridge/bridges/FDroidBridge.php

<?php
class FDroidBridge extends BridgeAbstract {

	const MAINTAINER = 'Mitsukarenai';
	const NAME = 'F-Droid Bridge';
	const URI = 'https://f-droid.org/';
	const CACHE_TIMEOUT = 60 * 60 * 4; // 4 hours
	const DESCRIPTION = 'Returns latest added/updated apps on the open-source Android apps repository F-Droid';

	const PARAMETERS = array( array(
		'u' => array(
			'name' => 'Widget selection',
			'type' => 'list',
			'values' => array(
				'Latest added apps' => 'added',
				'Latest updated apps' => 'updated'
			)
		)
	));

	public function getIcon() {
		return self::URI . 'assets/favicon.ico?v=8j6PKzW9Mk';
	}

	private function getTimestamp($url) {
		$curlOptions = array(
			CURLOPT_RETURNTRANSFER => true,
			CURLOPT_HEADER         => true,
			CURLOPT_NOBODY         => true,
			CURLOPT_CONNECTTIMEOUT => 19,
			CURLOPT_TIMEOUT        => 19,
		);
		$ch = curl_init($url);
		curl_setopt_array($ch, $curlOptions);
		$curlHeaders = curl_exec($ch);
		$curlError = curl_error($ch);
		curl_close($ch);
		if(!empty($curlError))
			return false;
		$curlHeaders = explode("\n", $curlHeaders);
		$timestamp = false;
		foreach($curlHeaders as $header) {
			if(strpos($header, 'Last-Modified') !== false) {
				$timestamp = str_replace('Last-Modified: ', '', $header);
				$timestamp = strtotime($timestamp);
			}
		}
		return $timestamp;
	}

	public function collectData(){
		$url = self::URI;
		$html = getSimpleHTMLDOM($url);

		// targetting the corresponding widget based on user selection
		// "updated" is the 5th widget on the page, "added" is the 6th

		switch($this->getInput('u')) {
			case 'updated':
				$html_widget = $html->find('div.sidebar-widget', 5);
				break;
			default:
				$html_widget = $html->find('div.sidebar-widget', 6);
				break;
		}

		// and now extracting app info from the selected widget (and yeah turns out icons are of heterogeneous sizes)

		foreach($html_widget->find('a') as $element) {
				$item = array();
				$item['uri'] = self::URI . $element->href;
				$item['title'] = $element->find('h4', 0)->plaintext;
				$item['icon'] = $element->find('img', 0)->src;
				$item['timestamp'] = $this->getTimestamp($item['icon']);
				$item['summary'] = $element->find('span.package-summary', 0)->plaintext;
				$item['content'] = '
					<a href="' . $item['uri'] . '">
						<img alt="" style="max-height:128px" src="' . $item['icon'] . '">
					</a><br>' . $item['summary'];
				$this->items[] = $item;
		}
	}
}