Add hashtag timeline

src/controllers/api/timelines.ts

@@ -1,8 +1,10 @@
 import { z } from '@/deps.ts';
+import * as mixer from '@/mixer.ts';
 import { getFeed, getPublicFeed } from '@/queries.ts';
 import { booleanParamSchema } from '@/schema.ts';
 import { toStatus } from '@/transformers/nostr-to-mastoapi.ts';
 import { buildLinkHeader, paginationSchema } from '@/utils/web.ts';
+import { Time } from '@/utils.ts';
 
 import type { AppController } from '@/app.ts';
 
@@ -40,4 +42,23 @@ const publicController: AppController = async (c) => {
   return c.json(statuses, 200, link ? { link } : undefined);
 };
 
-export { homeController, publicController };
+const hashtagTimelineController: AppController = async (c) => {
+  const hashtag = c.req.param('hashtag')!;
+  const params = paginationSchema.parse(c.req.query());
+
+  const events = await mixer.getFilters(
+    [{ kinds: [1], '#t': [hashtag], ...params }],
+    { timeout: Time.seconds(3) },
+  );
+
+  if (!events.length) {
+    return c.json([]);
+  }
+
+  const statuses = (await Promise.all(events.map(toStatus))).filter(Boolean);
+
+  const link = buildLinkHeader(c.req.url, events);
+  return c.json(statuses, 200, link ? { link } : undefined);
+};
+
+export { hashtagTimelineController, homeController, publicController };