109 lines
3.6 KiB
TypeScript
109 lines
3.6 KiB
TypeScript
import { nrkRadio, OriginalEpisode } from "../../../lib/nrk.ts";
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import { FreshContext } from "$fresh/server.ts";
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import { declaration, serialize, tag } from "https://raw.githubusercontent.com/olaven/serialize-xml/v0.4.0/mod.ts";
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import { getHostName } from "../../../utils.ts";
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function toItemTag(seriesId: string, episode: OriginalEpisode) {
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const description = episode.titles.subtitle || "";
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return tag("item", [
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tag("title", episode.titles.title),
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tag("link", episode._links.share?.href),
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tag("description", description),
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tag("itunes:summary", description),
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tag("guid", episode.id, [["isPermaLink", "false"]]),
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tag("pubDate", new Date(episode.date).toUTCString()),
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tag("itunes:duration", episode.durationInSeconds.toString()),
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tag("podcast:chapters", "", [
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[
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"url",
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`${getHostName()}/api/feeds/${seriesId}/${episode.episodeId}/chapters`,
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],
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["type", "application/json+chapters"],
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]),
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tag("enclosure", "", [
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["url", episode.url],
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["length", episode.durationInSeconds.toString()],
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["type", "audio/mpeg3"],
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]),
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]);
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}
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async function buildFeed(seriesId: string) {
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const serie = await nrkRadio.getSerieData(seriesId);
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const imageUrl = serie.squareImage.at(-1)?.url;
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const linkValue = `https://radio.nrk.no/podkast/${serie.id}`;
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// Quickly adapted from https://raw.githubusercontent.com/olaven/paperpod/1cde9abd3174b26e126aa74fc5a3b63fd078c0fd/packages/converter/src/rss.ts
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return serialize(
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declaration([
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["version", "1.0"],
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["encoding", "UTF-8"],
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]),
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tag(
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"rss",
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[
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tag("channel", [
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tag("title", serie.titles.title),
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tag("link", linkValue),
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tag("itunes:author", "NRK"),
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/* serie.category.id does not overlap with Apple's supported categories..
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These podcast feeds are not going to be indexed in itunes anyways, so
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a static, valid category is fine. The point is simply to pass third party
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podcast feed validation.
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*/
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tag("itunes:category", "", [["text", "Government"]]),
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tag("itunes:owner", [
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tag("itunes:name", "NRK"),
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tag("itunes:email", "nrkpodcast@nrk.no"),
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]),
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tag(
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"description",
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serie.titles.subtitle || "",
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),
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tag("ttl", "60"), //60 minutes
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...(imageUrl
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? [
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tag("itunes:image", "", [
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["href", imageUrl],
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]),
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tag("image", [
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tag("url", imageUrl),
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tag("title", serie.titles.title),
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tag("link", linkValue),
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]),
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]
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: []),
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...serie.episodes.map((episode) => toItemTag(seriesId, episode)),
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]),
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],
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[
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["version", "2.0"],
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["xmlns:itunes", "http://www.itunes.com/dtds/podcast-1.0.dtd"],
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["xmlns:content", "http://purl.org/rss/1.0/modules/content/"],
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["xmlns:podcast", "https://podcastindex.org/namespace/1.0"],
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],
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),
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);
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}
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export const handler = async (_req: Request, ctx: FreshContext): Promise<Response> => {
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const seriesId = ctx.params.seriesId;
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try {
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const feedContent = await buildFeed(seriesId);
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return new Response(feedContent, {
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headers: {
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"Content-Type": "application/xml",
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},
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});
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} catch (error) {
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console.error(error);
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return new Response(JSON.stringify({ message: "Could not generate feed" }), {
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status: 500,
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headers: {
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"Content-Type": "application/json",
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},
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});
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}
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};
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