Provide correct push worker update.

Author: rxu

notification/method/webpush.php

@@ -455,7 +455,7 @@ protected function prepare_avatar($avatar)
 
 		$path = !empty($matches[1]) ? end($matches[1]) : $avatar;
 
-		return preg_replace('#^' . preg_quote($this->path_helper->get_web_root_path(), '#') . '#', $this->get_board_url(), $path, 1);
+		return ['src' => preg_replace('#^' . preg_quote($this->path_helper->get_web_root_path(), '#') . '#', $this->get_board_url(), $path, 1)];
 	}
 
 	/**

styles/all/template/push_worker.js.twig

@@ -36,7 +36,7 @@ self.addEventListener('push', event => {
 			const options = {
 				body: responseBody,
 				data: response,
-				icon: response.avatar,
+				icon: response.avatar.src,
 			};
 			self.registration.showNotification(response.heading, options);
 		});

styles/all/template/webpush.js

@@ -57,9 +57,10 @@ function PhpbbWebpush() {
 
 		if ('serviceWorker' in navigator && 'PushManager' in window) {
 			navigator.serviceWorker.register(serviceWorkerUrl)
-				.then(() => {
+				.then((registration) => {
 					subscribeButton.addEventListener('click', subscribeButtonHandler);
 					unsubscribeButton.addEventListener('click', unsubscribeButtonHandler);
+					registration.update();
 
 					updateButtonState();
 				})