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import * as cheerio from "cheerio";
import { Result, Ok, Err } from "../../errors/results";
import { BaseError } from "../../errors/baseError";
class GetMetadataError extends BaseError {
constructor(message?: string, source?: string) {
super("[Fetch Metadata Error]", message, source);
}
}
export type Metadata = {
title: string;
description: string;
image: string;
baseUrl: string;
};
// TODO: THIS SHOULD PROBABLY ALSO FETCH THE OG-IMAGE
export async function getMetaData(
url: string,
): Promise<Result<Metadata, GetMetadataError>> {
try {
const response = await fetch(url);
const html = await response.text();
const $ = cheerio.load(html);
// Extract the base URL
const baseUrl = url;
// Extract title
const title = $("title").text().trim();
const description = $("meta[name=description]").attr("content") ?? "";
const _favicon =
$("link[rel=icon]").attr("href") ?? "https://supermemory.dhr.wtf/web.svg";
let favicon =
_favicon.trim().length > 0
? _favicon.trim()
: "https://supermemory.dhr.wtf/web.svg";
if (favicon.startsWith("/")) {
favicon = baseUrl + favicon;
} else if (favicon.startsWith("./")) {
favicon = baseUrl + favicon.slice(1);
}
return Ok({
title,
description,
image: favicon,
baseUrl,
});
} catch (e) {
console.error("[Metadata Fetch Error]", e);
return Err(new GetMetadataError((e as Error).message, "getMetaData"));
}
}
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