getNijiGtaAllArchivesDuration.ts

import { google } from "googleapis";
import { JSDOM } from "jsdom";

const getLiveUrls = async () => {
  const url =
    "https://wikiwiki.jp/nijisanji/Grand%20Theft%20Autoまとめ/GTA5/にじさんじGTA/配信一覧";
  const dom = await JSDOM.fromURL(url);
  const document = dom.window.document;

  const links = Array.from(document.getElementsByTagName("li"))
    .filter((li) => {
      // 配信日が24日までのものだけを取得
      const match = /^\[06\/(\d{2})]/.exec(li.textContent ?? "");
      if (match) {
        const date = parseInt(match[1], 10);
        return date <= 24;
      }
      return false;
    })
    .map((l) => l.getElementsByTagName("a")[0].href)
    // youtubeのリンクだけを取得
    // (叶さんのtwitch配信の時間数えるの面倒だったのでyoutubeにアップされた切り抜きの時間を採用しています)
    .filter((l) => l.includes("youtube") || l.includes("youtu.be"));

  return links;
};

const getVideoId = (url: string) => {
  const re =
    /(?:youtube\.com\/(?:[^\/\n\s]+\/\S+\/|(?:v|e(?:mbed)?)\/|\S*?[?&]v=)|youtu\.be\/)([a-zA-Z0-9_-]{11})/;
  const match = re.exec(url);
  if (match) {
    return match[1];
  }
  return null;
};

const sliceBy = <T>(arr: T[], n: number) => {
  const result = [];
  for (let i = 0; i < arr.length; i += n) {
    result.push(arr.slice(i, i + n));
  }
  return result;
};

const getVideoDurations = async (ids: string[]) => {
  const youtube = google.youtube({
    version: "v3",
    auth: process.env["GOOGLE_API_KEY"] ?? "",
  });
  const results = await Promise.all(
    sliceBy(ids, 50).map((ids) =>
      youtube.videos.list({
        part: ["contentDetails"],
        id: ids,
        maxResults: 50,
      })
    )
  );
  const durations = results.map((res) =>
    res.data.items?.map((item) => item.contentDetails?.duration)
  );

  return durations.flat();
};

// parse ISO8601 duration
const parseDuration = (duration: string) => {
  const re = /PT(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?/;
  const match = re.exec(duration);
  if (match) {
    const hours = parseInt(match[1] ?? "0", 10);
    const minutes = parseInt(match[2] ?? "0", 10);
    const seconds = parseInt(match[3] ?? "0", 10);
    return hours * 3600 + minutes * 60 + seconds;
  }
  return 0;
};

const main = async () => {
  const urls = await getLiveUrls();
  const ids = urls.map(getVideoId).filter((id) => id !== null);
  const durations = await getVideoDurations(ids);
  const seconds = durations
    .map((d) => parseDuration(d ?? ""))
    .reduce((a, b) => a + b, 0);
  console.log(seconds);
};

await main();