feat: add POST /notes/feed endpoint for multi-DID filtering

server.ts

@@ -4,6 +4,7 @@ import {
   deleteWebhooksByDid,
   getNotes,
   getNotesByDid,
+  getNotesByDids,
 } from "./src/data/db.ts";
 import { log } from "./src/log.ts";
 
@@ -28,6 +29,17 @@ router.get("/:did/notes", (ctx) => {
   ctx.response.body = getNotesByDid(did, cursor, limit);
 });
 
+router.post("/notes/feed", async (ctx) => {
+  const body = await ctx.request.body.json();
+  const { dids, cursor, limit } = body ?? {};
+  if (!Array.isArray(dids) || dids.length === 0) {
+    ctx.response.status = 400;
+    ctx.response.body = { error: "dids must be a non-empty array" };
+    return;
+  }
+  ctx.response.body = getNotesByDids(dids, cursor, Number(limit) || PAGINATION);
+});
+
 router.post("/:did/webhooks", async (ctx) => {
   const { did } = ctx.params;
   const body = await ctx.request.body.json();