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import { JSDOM } from 'jsdom'
import { mapNodeList } from './util'
function selectTrimTextContent(ele: Element, selector: string): string {
return ele.querySelector(selector)?.textContent?.trim() || ''
}
const livePreviewImageHosts: readonly string[] = [
'img.youtube.com',
'schedule-static.hololive.tv',
] as const
function hostOf(src: string) {
return new URL(src).host
}
function dataFromAThumbnail(thumb: Element) {
const time = selectTrimTextContent(thumb, '.datetime')
const name = selectTrimTextContent(thumb, '.name')
const images = mapNodeList(
thumb.querySelectorAll('img'),
(img) => img.src,
)
const avatarImages = images.filter((src) => hostOf(src) === 'yt3.ggpht.com')
const livePreviewImage =
images.find(src => livePreviewImageHosts.includes(hostOf(src))) || ''
return {
time,
name,
avatarImages,
livePreviewImage,
}
}
interface LiveBlock {
time: Date
streamer: string
avatarImages: string[]
livePreviewImage: string
link: string
streaming: boolean
}
function parseToLiveBlocks(html: string | Buffer): LiveBlock[] {
const { window } = new JSDOM(html)
const { document } = window
const year = (new Date()).getFullYear().toString()
const rows = document.querySelectorAll('#all > .container > .row')
let date = ''
const lives: LiveBlock[] = []
rows.forEach(row => {
const dateDiv = row.querySelector('.holodule')
if (dateDiv) {
date = dateDiv.textContent?.replace(/\s+/g, '') || ''
date = date.match(/\d+\/\d+/)![0].replace('/', '-')
}
const allThumbnail: NodeListOf<HTMLAnchorElement> = row.querySelectorAll('a.thumbnail')
allThumbnail.forEach(thumbnail => {
const link = thumbnail.href
const streaming = thumbnail.style.borderColor === 'red'
const { time, name, avatarImages, livePreviewImage } = dataFromAThumbnail(thumbnail)
lives.push({
link,
avatarImages,
livePreviewImage,
time: new Date(`${year}-${date}T${time}:00+09:00`),
streamer: name,
streaming,
})
})
})
return lives
}
export type StreamerImageDict = Record<string, string>
type ImageStreamerDict = Record<string, string>
function nextStreamerImageDict(liveBlocks: LiveBlock[], oldDict: StreamerImageDict) {
const dict = { ...oldDict }
liveBlocks.forEach(({ avatarImages: images, streamer }) => {
dict[streamer] = images[0]
})
return dict
}
function reverseDict(dict: StreamerImageDict): ImageStreamerDict {
const reversed: ImageStreamerDict = {}
Object.entries(dict).forEach(([streamer, img]) => {
reversed[img] = streamer
})
return reversed
}
export interface LiveInfo {
time: Date
link: string
videoId: string
streamer: string
livePreviewImage: string
guests: string[]
streaming: boolean
}
interface ParseResult {
lives: LiveInfo[]
dict: StreamerImageDict
}
function getVideoId(link: string): string {
return link.replace('https://www.youtube.com/watch?v=', '')
}
/**
* @param html - Html of https://schedule.hololive.tv. Get with Japan timezone (GTM+9)
* @param storedDict - An object stored { vtuberName: iconImageSrc }
* @returns - Lives schedule and updated dict
*/
function parseScheduleHtml(
html: string | Buffer,
storedDict: StreamerImageDict = {},
): ParseResult {
const liveBlocks = parseToLiveBlocks(html)
const streamerImageDict = nextStreamerImageDict(liveBlocks, storedDict)
const dict = reverseDict(streamerImageDict)
const lives = liveBlocks.map(liveBlocks => {
const { streamer, avatarImages, time, link, livePreviewImage, streaming } = liveBlocks
const guests = avatarImages.splice(1).map(x => dict[x]).filter(Boolean)
const videoId = getVideoId(link)
return {
time,
streamer,
guests,
link,
videoId,
livePreviewImage,
streaming,
}
})
return { lives, dict: streamerImageDict }
}
export default parseScheduleHtml
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