101 lines
3.1 KiB
TypeScript
101 lines
3.1 KiB
TypeScript
/**
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* Previews links to this site's own dump, user and playlist pages, as
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* `parsePagePath` reads them, from the database, for
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* `rich-content-service.ts`. No request goes out, so this works even when the
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* site runs on a private host that `fetchWithTimeout` refuses.
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*
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* @module
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*/
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import type { RichContent } from "../../../shared/dump.ts";
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import type { RichContentProvider } from "./provider.ts";
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import { getDumpByPath } from "../../services/dump-service.ts";
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import { resolveUsername } from "../../services/user-service.ts";
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import { getPlaylistByPath } from "../../services/playlist-service.ts";
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import { APIException } from "../../lib/api-exception.ts";
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import { PUBLIC_URL, THEME_COLOR } from "../../config.ts";
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import { isSelfUrl } from "../../lib/self-url.ts";
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import { parsePagePath } from "../../../shared/paths.ts";
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/**
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* Gives a link to this site without a thumbnail a placeholder in the site's
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* icon and color.
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*/
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const SELF_BRANDING = {
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siteName: "gerbeur",
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faviconUrl: `${PUBLIC_URL}/apple-touch-icon.png`,
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accentColor: THEME_COLOR,
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} as const;
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/**
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* Comes before the generic provider, and claims what `isSelfUrl` accepts. A
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* profile's tab previews as the profile. Its `fetch` rejects with a 404
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* `APIException` for a missing page, a private dump or a private playlist:
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* the preview is stored in the linking dump, which others may see.
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*/
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export const selfProvider: RichContentProvider = {
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name: "self",
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matches(url: string): boolean {
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try {
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return isSelfUrl(new URL(url));
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} catch {
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return false;
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}
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},
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fetch(url: string): Promise<RichContent> {
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// matches() let only these paths through.
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const page = parsePagePath(new URL(url).pathname)!;
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const user = resolveUsername(page.username);
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if (page.kind === "dump") {
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const dump = getDumpByPath(user.id, page.slug);
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let thumbnailUrl: string | undefined;
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if (dump.kind === "file" && dump.fileMime?.startsWith("image/")) {
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thumbnailUrl = `${PUBLIC_URL}/api/dumps/${dump.id}/file`;
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} else if (dump.richContent?.thumbnailUrl) {
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thumbnailUrl = dump.richContent.thumbnailUrl;
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}
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return Promise.resolve({
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type: "generic",
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url,
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...SELF_BRANDING,
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title: dump.title,
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description: dump.comment,
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thumbnailUrl,
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});
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}
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if (page.kind === "playlist") {
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const playlist = getPlaylistByPath(user.id, page.slug);
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if (!playlist.isPublic) {
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throw new APIException(404, "Playlist not found");
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}
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const thumbnailUrl = playlist.imageMime
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? `${PUBLIC_URL}/api/playlists/${playlist.id}/cover`
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: undefined;
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return Promise.resolve({
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type: "generic",
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url,
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...SELF_BRANDING,
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title: playlist.title,
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description: playlist.description,
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thumbnailUrl,
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});
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}
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const thumbnailUrl = user.avatarMime
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? `${PUBLIC_URL}/api/users/${user.id}/avatar`
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: undefined;
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return Promise.resolve({
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type: "generic",
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url,
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...SELF_BRANDING,
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title: user.username,
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description: user.description,
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thumbnailUrl,
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});
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},
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};
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