// ==UserScript==
// @name         Bilibili MediaSession Helper
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  Dock metadata to MediaSession API for bilibili.com (Chrome 73+)
// @author       nondanee
// @match        https://www.bilibili.com/video/av*
// @grant        none
// @downloadURL none
// ==/UserScript==

(() => {
	const image = new Image()
	const title = document.head.querySelector("[itemprop='name']").content
	const artist = document.head.querySelector("[itemprop='author']").content
	if ('mediaSession' in navigator) {
		image.onload = () => {
			navigator.mediaSession.metadata = new MediaMetadata({
				title,
				artist,
				artwork: [{src: image.src, sizes: `${image.naturalWidth}x${image.naturalHeight}`, type: 'image/jpeg'}]
			})
		}
		image.src = document.head.querySelector("[itemprop='thumbnailUrl']").content || null
	}
})()