Function downloadMarkdownWithImages

contents/weixin.tsx:286–348

(
    onProgress?: (current: number, total: number) => void
  )

  }

  async function downloadMarkdownWithImages(
    onProgress?: (current: number, total: number) => void
  ) {
    await scrollToLoadImages()

    const html = document.querySelector("#img-content")
    if (!html) return

    let markdown = turndownService.turndown(html)
    const mdImageRegex = /!\[([^\]]*)\]\(([^)]+)\)/g
    const imageEntries: { alt: string; url: string }[] = []
    let match
    while ((match = mdImageRegex.exec(markdown)) !== null) {
      const url = match[2]
      if (url && !url.startsWith("./images/")) {
        imageEntries.push({ alt: match[1], url })
      }
    }

    const zip = new JSZip()
    const title = articleTitle || document.title.trim()
    const total = imageEntries.length + 1

    const getExt = (url: string) => {
      const fmt = url.match(/wx_fmt=(\w+)/)?.[1] || ""
      if (fmt === "gif") return ".gif"
      if (fmt === "png" || fmt === "webp") return ".png"
      if (fmt === "bmp") return ".bmp"
      if (url.includes("mmbiz_gif")) return ".gif"
      if (url.includes("mmbiz_png") || url.includes("mmbiz_webp")) return ".png"
      return ".jpg"
    }

    // 下载图片并替换 markdown 中的 URL
    for (let i = 0; i < imageEntries.length; i++) {
      const { url } = imageEntries[i]
      try {
        const response = await fetch(url)
        const blob = await response.blob()
        const ext = getExt(url)
        const localPath = `./images/${i}${ext}`

        zip.file(`images/${i}${ext}`, blob)
        markdown = markdown.replace(url, localPath)

        if (onProgress) {
          onProgress(i + 1, total)
        }
      } catch (error) {
        console.error(`Failed to download image ${i}:`, error)
      }
    }

    // 添加 markdown 文件到 zip
    zip.file(`${title}.md`, markdown)

    if (onProgress) {
      onProgress(total, total)