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import { Config } from "../config.ts";
import { el } from "../dom.ts";
import { Page } from "../page.ts";
import { Entry, Feed } from "./types.ts";
import { PostPage } from "../pages/post.ts";
import { SlidePage } from "../pages/slide.ts";
import { dateToRfc3339String } from "../revision.ts";
const BASE_NAME = "atom.xml";
export function generateFeedPageFromEntries(
alternateLink: string,
feedSlug: string,
feedTitle: string,
entries: Array<PostPage | SlidePage>,
config: Config,
): Page {
const entries_: Entry[] = [];
for (const entry of entries) {
entries_.push({
id: `urn:uuid:${entry.uuid}`,
linkToAlternate: `https://${config.blog.fqdn}${entry.href}`,
title: entry.title,
summary: entry.description,
published: dateToRfc3339String(entry.published),
updated: dateToRfc3339String(entry.updated),
});
}
// Sort by published date in ascending order.
entries_.sort((a, b) => {
if (a.published < b.published) {
return 1;
} else if (a.published > b.published) {
return -1;
}
return 0;
});
const feedPath = `${alternateLink}${BASE_NAME}`;
const feed: Feed = {
author: config.blog.author,
icon: `https://${config.blog.fqdn}/favicon.svg`,
id: `tag:${config.blog.fqdn},${config.blog.siteCopyrightYear}:${feedSlug}`,
linkToSelf: `https://${config.blog.fqdn}${feedPath}`,
linkToAlternate: `https://${config.blog.fqdn}${alternateLink}`,
title: feedTitle,
updated: entries_.reduce(
(latest, entry) => entry.updated > latest ? entry.updated : latest,
entries_[0].updated,
),
entries: entries_,
};
const xml = buildXmlTree(feed);
return {
root: el("__root__", [], xml),
renderer: "xml",
destFilePath: feedPath,
href: feedPath,
};
}
function buildXmlTree(feed: Feed) {
return el(
"feed",
[["xmlns", "http://www.w3.org/2005/Atom"]],
el("id", [], feed.id),
el("title", [], feed.title),
el("link", [["rel", "alternate"], ["href", feed.linkToAlternate]]),
el("link", [["rel", "self"], ["href", feed.linkToSelf]]),
el("author", [], el("name", [], feed.author)),
el("updated", [], feed.updated),
...feed.entries.map(
(entry) =>
el(
"entry",
[],
el("id", [], entry.id),
el("link", [["rel", "alternate"], ["href", entry.linkToAlternate]]),
el("title", [], entry.title),
el("summary", [], entry.summary),
el("published", [], entry.published),
el("updated", [], entry.updated),
),
),
);
}
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