friendica/src/Module/OpenSearch.php

<?php

namespace Friendica\Module;

use DOMDocument;
use DOMElement;
use Friendica\BaseModule;
use Friendica\DI;
use Friendica\Util\XML;

/**
 * Prints the opensearch description document
 * @see https://github.com/dewitt/opensearch/blob/master/opensearch-1-1-draft-6.md#opensearch-description-document
 */
class OpenSearch extends BaseModule
{
	/**
	 * @throws \Exception
	 */
	public static function rawContent(array $parameters = [])
	{
		header('Content-type: application/opensearchdescription+xml');

		$hostname = DI::app()->getHostName();
		$baseUrl  = DI::app()->getBaseURL();

		/** @var DOMDocument $xml */
		$xml = null;

		XML::fromArray([
			'OpenSearchDescription' => [
				'@attributes' => [
					'xmlns' => 'http://a9.com/-/spec/opensearch/1.1',
				],
				'ShortName'   => "Friendica $hostname",
				'Description' => "Search in Friendica $hostname",
				'Contact'     => 'https://github.com/friendica/friendica/issues',
			],
		], $xml);

		/** @var DOMElement $parent */
		$parent = $xml->getElementsByTagName('OpenSearchDescription')[0];

		XML::addElement($xml, $parent, 'Image',
			"$baseUrl/images/friendica-16.png", [
				'height' => 16,
				'width'  => 16,
				'type'   => 'image/png',
			]);

		XML::addElement($xml, $parent, 'Image',
			"$baseUrl/images/friendica-64.png", [
				'height' => 64,
				'width'  => 64,
				'type'   => 'image/png',
			]);

		XML::addElement($xml, $parent, 'Url', '', [
			'type'     => 'text/html',
			'template' => "$baseUrl/search?search={searchTerms}",
		]);

		XML::addElement($xml, $parent, 'Url', '', [
			'type'     => 'application/opensearchdescription+xml',
			'rel'      => 'self',
			'template' => "$baseUrl/opensearch",
		]);

		echo $xml->saveXML();

		exit();
	}
}