linker/src/lib/websiteTitle.ts

export async function getWebsiteTitle(url: string): Promise<string | null> {
    const res = await fetch(url, { redirect: "follow" })

    if (!res.ok) {
        return null
    }

    const contentType = res.headers.get("content-type")
    if (!contentType || !contentType.includes("text/html")) {
        return null
    }

    const html = await res.text()

    const titleMatch = html.match(/<title[^>]*>([^<]*)<\/title>/i)

    if (titleMatch && titleMatch[1]) {
        const title = titleMatch[1]
            .replace(/&lt;/g, "<")
            .replace(/&gt;/g, ">")
            .replace(/&amp;/g, "&")
            .replace(/&quot;/g, "\"")
            .replace(/&#39;/g, "'")
            .replace(/&nbsp;/g, " ")
            .trim()

        return title || null
    }

    return null
}