nextcloud_minimalprofile/lib/AppInfo/Application.php

<?php

declare(strict_types=1);

namespace OCA\MinimalProfile\AppInfo;

use OCA\MinimalProfile\Service\Config;
use OCP\AppFramework\App;
use OCP\AppFramework\Bootstrap\IBootContext;
use OCP\AppFramework\Bootstrap\IBootstrap;
use OCP\AppFramework\Bootstrap\IRegistrationContext;
use OCP\AppFramework\Http\TemplateResponse;
use OCP\EventDispatcher\Event;
use OCP\Util;

class Application extends App implements IBootstrap {

	public const APP_ID = 'minimalprofile';

	public function __construct(array $urlParams = []) {
		parent::__construct(self::APP_ID, $urlParams);
	}

	public function register(IRegistrationContext $context): void {
		$context->registerService(Config::class, function($c) {
			return new Config($c->get(\OCP\IConfig::class));
		});

		$context->registerEventListener(
			TemplateResponse::EVENT_LOAD_ADDITIONAL_SCRIPTS,
			function(Event $event) {
				if (!($event instanceof TemplateResponse)) {
					return;
				}
				$container = $event->getAppContainer();
				$config = $container->query(Config::class);
				$hidden = $config->getHiddenFields();
				
				if (!empty($hidden)) {
					$css = $config->generateCss($hidden);
					Util::addInlineStyle($css);
				}
			}
		);
	}

	public function boot(IBootContext $context): void {
	}
}