93 lines
3.2 KiB
TypeScript
93 lines
3.2 KiB
TypeScript
import { declaration, serialize, Tag, tag } from "serialize-xml";
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import { getHostUrl } from "./utils.ts";
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import { Episode, Series } from "./storage.ts";
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function assembleFeed(series: Series): string {
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// Originally 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", series.title),
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tag("link", series.link),
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tag("itunes:author", "NRK"),
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/**
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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("description", series.subtitle || ""),
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tag("ttl", "60"), //60 minutes
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...(series.imageUrl
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? [
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tag("itunes:image", "", [["href", series.imageUrl]]),
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tag("image", [
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tag("url", series.imageUrl),
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tag("title", series.title),
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tag("link", series.link),
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]),
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]
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: []),
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...series.episodes.map((episode) => assembleEpisode(episode, series.id)),
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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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function descriptionWithDonationPromotion(description: string): string {
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const firstPromotion = `⬇️NRSS er avhengig av din Vipps-støtte⬇️`;
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const secondPromotion =
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`Takk for at du bruker NRSS 🙏🌟 Vurder å støtte utviklingen via Vipps med omtrent det samme som prisen på en kaffekopp. Se mer på https://nrss.deno.dev/`;
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return `${firstPromotion}\n\n${description}\n\n${secondPromotion}`;
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}
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function assembleEpisode(episode: Episode, seriesId: Series["id"]): Tag {
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const description = descriptionWithDonationPromotion(episode.subtitle || "");
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return tag("item", [
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tag("title", episode.title),
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tag("link", episode.shareLink),
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tag("description", description),
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tag("itunes:summary", description),
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tag("guid", episode.id, [["isPermaLink", "false"]]),
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tag("pubDate", new Date(episode.date).toUTCString()),
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tag("itunes:duration", episode.durationInSeconds.toString()),
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tag("podcast:chapters", "", [
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["url", `${getHostUrl()}/api/feeds/${seriesId}/${episode.id}/chapters`],
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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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export const rss = {
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assembleFeed,
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};
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export const forTestingOnly = {
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assembleEpisode,
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};
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