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path: root/website/src/pages/blog/[...slug].astro
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---
import { type CollectionEntry, getCollection, render } from 'astro:content';
import BlogPost from '../../layouts/BlogPost.astro';
import  * as Gemtext from 'gemtext';

export async function getStaticPaths() {
	const posts = await getCollection('blog');
	return posts.map((post) => ({
		params: { slug: post.id },
		props: post,
	}));
}
type Props = CollectionEntry<'blog'>;

function htmlEscape(str: string) {
    return str.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
}

const GemtextHTMLRenderer: Gemtext.Renderer<string> = {
  preamble: function (): string {
  return '';
  },
  postamble: function (): string {
  return '';
  },
  text: function (content: string): string {
    content = content.trim();
    if (content === '') {
      return '';
    }
    return `<p>${htmlEscape(content)}</p>`
  },
  link: function (url: string, alt: string): string {
    return `<p>=> <a href="${url}">${alt}</a></p>`;
  },
  preformatted: function (content: string[], alt: string): string {
    return `<pre alt="${alt}">${htmlEscape(content.join('\n'))}</pre>`
  },
  heading: function (level: number, text: string): string {
    return `<h${level}>${htmlEscape(text)}</h${level}>`;
  },
  unorderedList: function (content: string[]): string {
    return `<ul>${content.map(li=>`<li>${htmlEscape(li)}</li>`).join('')}</ul>`;
  },
  quote: function (content: string): string {
    return `<blockquote>${htmlEscape(content)}</blockquote>`;
  }
};

const post = Astro.props;
const Content = post.filePath?.endsWith('.gmi')
  ? Gemtext.parse((post.body ?? '').replace(`# ${post.data.title}`, '')).generate(GemtextHTMLRenderer)
  : (await render(post)).Content;
---

<BlogPost {...post.data}>
  { post.filePath?.endsWith('.gmi') ? <Fragment set:html={Content}></Fragment> : <Content />}
</BlogPost>