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/*
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 *  This file is part of CoCalc: Copyright © 2023 Sagemath, Inc.
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 *  License: MS-RSL – see LICENSE.md for details
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 */
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import { NewsItem } from "./types/news";
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// Slug URL, based on the title and with "-[id]" at the end.
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// https://www.semrush.com/blog/what-is-a-url-slug/
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// The main point here is to have a URL that contains unique information and is human readable.
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export function slugURL(news?: Pick<NewsItem, "id" | "title">): string {
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  if (!news || !news.title || !news.id) return "/news";
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  const { title, id } = news;
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  const shortTitle = title
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    .toLowerCase()
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    // limit the max length, too long URLs are bad as well
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    .slice(0, 200)
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    // replace all non-alphanumeric characters with a space
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    .replace(/[^a-zA-Z0-9]/g, " ")
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    // replace multiple spaces with a single dash
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    .replace(/\s+/g, "-");
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  return `/news/${shortTitle}-${id}`;
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}
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