Function getVideoEmbedInfo

src/utils/helpers.js:334–392

(url)

 * @returns {Object|null} { embedUrl, platform, isEmbed: true } 或 null
 */
export const getVideoEmbedInfo = (url) => {
  if (!url || typeof url !== 'string') return null;

  // 1. YouTube
  // https://www.youtube.com/watch?v=dQw4w9WgXcQ
  // https://youtu.be/dQw4w9WgXcQ
  const ytRegex = /(?:youtube\.com\/watch\?v=|youtu\.be\/|youtube\.com\/embed\/)([^&\s?]+)/;
  const ytMatch = url.match(ytRegex);
  if (ytMatch) {
    return {
      embedUrl: `https://www.youtube.com/embed/${ytMatch[1]}`,
      platform: 'youtube',
      isEmbed: true
    };
  }

  // 2. Bilibili
  // https://www.bilibili.com/video/BV1GJ411x7h7
  // http://player.bilibili.com/player.html?bvid=BV1GJ411x7h7
  const biliRegex = /(?:bilibili\.com\/video\/|player\.bilibili\.com\/player\.html\?bvid=)(BV[a-zA-Z0-9]+)/;
  const biliMatch = url.match(biliRegex);
  if (biliMatch) {
    return {
      // 增加 high_quality=1&danmaku=0 等参数优化预览体验
      embedUrl: `//player.bilibili.com/player.html?bvid=${biliMatch[1]}&page=1&high_quality=1&danmaku=0`,
      platform: 'bilibili',
      isEmbed: true
    };
  }

  // 3. X (Twitter)
  // X 的嵌入比较特殊，通常是嵌入整个 Tweet
  // https://x.com/username/status/123456789
  // https://twitter.com/username/status/123456789
  const xRegex = /(?:x\.com|twitter\.com)\/[a-zA-Z0-9_]+\/status\/(\d+)/;
  const xMatch = url.match(xRegex);
  if (xMatch) {
    return {
      // 使用 Twitter 官方的嵌入部件 URL (这种方式在 iframe 中可能受限，取决于平台策略)
      // 备选方案是返回原始链接但在预览中提示使用 X 的嵌入
      embedUrl: `https://platform.twitter.com/embed/Tweet.html?id=${xMatch[1]}`,
      platform: 'x',
      isEmbed: true
    };
  }

  // 4. Direct Video Link (mp4, webm, ogg, etc.)
  const videoExtRegex = /\.(mp4|webm|ogg|mov|m4v)(?:\?.*)?$/i;
  if (videoExtRegex.test(url)) {
    return {
      embedUrl: url,
      platform: 'video',
      isEmbed: false // Direct video tag, not iframe
    };
  }

  // 如果不是已知平台，返回 null
  return null;