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// https://github.com/wabilin/holo-schedule
function mapNodeList<E extends Element, T>(list: NodeListOf<E>, mapper: (ele: E) => T): T[] {
const ary: T[] = [];
list.forEach((node) => {
ary.push(mapper(node));
});
return ary;
}
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): LiveBlock[] {
const parser = new DOMParser();
const doc = parser.parseFromString(html, 'text/html');
const year = new Date().getFullYear().toString();
const rows = doc.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, '') || '';
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
date = date.match(/\d+\/\d+/)![0].replace('/', '-');
// const dateMatch = date.match(/\d+\/\d+/);
//
// date = dateMatch ? dateMatch[0].replace('/', '-') : '';
}
const allThumbnail = row.querySelectorAll('a.thumbnail');
allThumbnail.forEach((t) => {
const thumbnail = t as HTMLAnchorElement;
const link = thumbnail.href;
const streaming = thumbnail.style.borderColor === 'red';
// The dataFromAThumbnail function needs to be adjusted to work with the parsed document.
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
*/
export function parseScheduleHtml(html: string, 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 };
}
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