Add basic user route.

src/app/api/activitypub/user/[user]/route.ts

@@ -0,0 +1,22 @@
+import db from "@/db/drizzle";
+import { user } from "@/db/schema";
+import { eq } from "drizzle-orm";
+import { NextRequest } from "next/server";
+
+export const dynamic = 'force-dynamic';
+
+export async function GET(request: NextRequest, {params}: {params: {user: string}}) {
+    const rows = (await db.select({activity: user.activity}).from(user).where(eq(user.name, params.user)));
+    const activity = rows[0]?.activity;
+    if ( activity ) {
+        return new Response(activity, {
+            headers: {
+                "Content-Type": "application/activity+json; charset=utf-8"
+            }
+        })
+    }
+
+    return new Response("", {
+        status: 404
+    })
+}