Script YouTube Metadata for Obsidian QuickAdd

script_youtube_quickAdd.js

const notice = (msg) => new Notice(msg, 5000);

const YOUTUBE_URL = "https://m.youtube.com/watch";

const youtubeIdRegExp = /(?:(?:youtube.com\/watch\?v=)|(?:youtu.be\/)|(?:youtube.com\/embed\/))([A-Za-z0-9\_\-]+)/i;

let QuickAdd;
let Settings;

module.exports = async function start(params, settings) {
  QuickAdd = params;
  Settings = settings;

  const query = await QuickAdd.quickAddApi.inputPrompt(
    "Enter Youtube URL: "
  );
  if (!query) {
    notice("No query entered.");
    throw new Error("No query entered.");
  }

  let youtubeMetadata;

  if (!isYoutube(query)) {
    throw new Error("Please enter YouTube URL");
  }

  const [, youtubeId] = youtubeIdRegExp.exec(query);
  youtubeMetadata = await getByYoutubeId(youtubeId);

  QuickAdd.variables = {
    ...youtubeMetadata,
    fileName: replaceIllegalFileNameCharactersInString(youtubeMetadata.title),
  };
}

function isYoutube(str) {
  return /^(.*.)?(youtube.com|youtu.be)\/\w+/i.test(str);
}

async function getByYoutubeId(id) {
  const res = await request({
    url: `${YOUTUBE_URL}?v=${id}`,
    method: "GET",
    cache: "no-cache",
  });

  if (!res) {
    notice("No results found.");
    throw new Error("No results found.");
  }

  const regexp = /<meta\s(property="og:|itemprop=")(?<key>(\w|:)+)"\s*content="(?<value>[^"]+)">/gi
  const result = {
    shortUrl: `https://youtu.be/${id}`
  };
  let matched;
  while (matched = regexp.exec(res)) {
    const { key, value } = matched.groups;
    const newKey = snakeToCamel(key);
    if (newKey === 'videoTag') {
      if (!result[newKey]) result[newKey] = [];
      result[newKey].push(value);
    } else {
      result[newKey] = value?.replace(/\n|\r/g, ' ');
    }
  };
  return result;
}

function replaceIllegalFileNameCharactersInString(string) {
  return string.replace(/[\\,#%&\{\}\/*<>?$\'\":@\[\]\|]*/g, "").replace(/\s+/g, ' ');
}

const snakeToCamel = (str) => {
  if (!/[-_:]/.test(str)) return str;
  return str.toLowerCase().replace(/([-_:][a-z])/g, group =>
    group
      .toUpperCase()
      .replace(/-|_|:/g, '')
  );
}