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---
import type { CollectionEntry } from 'astro:content';
import { getCollection } from 'astro:content';
export interface Props {
headingLevel?: 1 | 2 | 3 | 4 | 5 | 6,
hideAuthor?: boolean,
};
const { headingLevel = 2, hideAuthor = false } = Astro.props;
const posts = (await getCollection('blog')).filter((post) => !post.data.hidden);
const distinctYears: number[] = posts
.map(post => post.data.pubDate.getFullYear())
.reduce<number[]>((acc, curr) => acc.includes(curr) ? acc : [...acc, curr], [])
.sort((a, b) => b - a);
function matchesYear(year: number) {
return (post: CollectionEntry<'blog'>) => post.data.pubDate.getFullYear() === year;
}
function sortByPubDateDescending(post1: CollectionEntry<'blog'>, post2: CollectionEntry<'blog'>) {
const date1 = post1.data.pubDate.getMilliseconds();
const date2 = post2.data.pubDate.getMilliseconds();
return date2 - date1;
}
const headingElem = `h${headingLevel}`;
const subHeadingElem = `h${headingLevel + 1}`
const canonicalBlogUrl = new URL('blog', Astro.site)
---
<section class="h-feed">
<Fragment set:html={`
<${headingElem} class="p-name">
My blog
</${headingElem}>
`} />
<aside>
<p hidden={hideAuthor}>
This blog is written by <a class="p-author h-card" href="/">Joe Carstairs</a>
</p>
<p hidden>
<a class="u-url" href={canonicalBlogUrl}>Permalink</a>
</p>
</aside>
{ distinctYears.map(year => (
<Fragment set:html={`
<${subHeadingElem}>
${year}
</${subHeadingElem}>
`} />
<ul>
{ posts.filter(matchesYear(year)).sort(sortByPubDateDescending).map(post => (
<li class="h-entry">
<a class="u-url p-name" href={`/blog/${post.slug}`}>{post.data.title}</a>
</li>
)) }
</ul>
)) }
</section>
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