Dock metadata to MediaSession API for bilibili.com (Chrome 73+)
// ==UserScript==
// @name Bilibili MediaSession Helper
// @namespace http://tampermonkey.net/
// @version 0.7.1
// @description Dock metadata to MediaSession API for bilibili.com (Chrome 73+)
// @author nondanee
// @match https://*.bilibili.com/*
// @grant none
// ==/UserScript==
(() => {
if (!('mediaSession' in navigator)) return
if (self != top) return
const { mediaSession } = navigator
const proxy = navigator.mediaSession = new Proxy(
mediaSession,
{
set: (target, key, value) => value, // official mediameta do not have artist field
get: (target, key) => (target[key] || {}).bind ? target[key].bind(target) : target[key],
}
)
Object.defineProperty(navigator, 'mediaSession', {
get: () => proxy
})
const updateMetadata = () =>
Promise.resolve()
.then(() => {
const url = window.location.href
let id, title, artist, cover
if (id = (url.match(/live\.bilibili\.com\/(\d+)/) || [])[1]) {
return fetch(`//api.live.bilibili.com/xlive/web-room/v1/index/getInfoByRoom?room_id=${id}`)
.then(response => response.json())
.then(body => body.data)
.then(data => ({
...data.room_info,
artist: data.anchor_info.base_info.uname
}))
}
else if (id = (url.match(/bilibili\.com\/video\/(av|BV)(\d+)/) || [])[1]) {
const { videoData } = window.__INITIAL_STATE__
return {
title: videoData.title,
artist: videoData.owner.name,
cover: videoData.pic.replace('https:', '').replace('http:', '')
}
}
else if (id = (url.match(/bilibili\.com\/bangumi\/play\/(\w+)/) || [])[1]) {
const { progress = {} } = window.__PGC_USERSTATE__
const { epInfo, epList, mediaInfo, sections = [] } = window.__INITIAL_STATE__
if (id.startsWith('ss'))
id = epInfo.id === -1 ? progress.last_ep_id : epInfo.id
else if (id.startsWith('ep'))
id = id.slice(2)
const epListFromSections = sections.reduce((output, section) => output.concat(section.epList), [])
const targetEpInfo = Array.prototype.concat(epList, epListFromSections).find(item => item.id.toString() === id.toString())
return {
title: mediaInfo.title,
artist: [targetEpInfo.titleFormat, targetEpInfo.longTitle].join(' ').trim(),
cover: targetEpInfo.cover
}
}
})
.then(({ title, artist, cover }) => {
const image = new Image()
image.onload = () => {
mediaSession.metadata = new window.MediaMetadata({
title,
artist,
artwork: [{ src: cover, sizes: `${image.naturalWidth}x${image.naturalHeight}`, type: 'image/jpeg' }]
})
}
image.src = cover
})
updateMetadata()
const { pushState, replaceState } = history
history.pushState = function (...props) {
pushState.apply(this, props)
updateMetadata()
}
history.replaceState = function (...props) {
replaceState.apply(this, props)
updateMetadata()
}
})()