feat(events): stream Redis invalidations over SSE

app/api/events/admin/route.ts

@@ -0,0 +1,24 @@
+import {
+  AdminAuthorizationError,
+  requireAdmin,
+} from "@/lib/auth/server";
+import {
+  createRedisEventResponse,
+  eventsUnavailableResponse,
+} from "@/lib/events/redis-stream";
+
+export async function GET(request: Request) {
+  try {
+    await requireAdmin();
+  } catch (cause) {
+    if (cause instanceof AdminAuthorizationError) {
+      return Response.json({ error: "unauthorized" }, { status: 401 });
+    }
+    throw cause;
+  }
+  try {
+    return await createRedisEventResponse("admin", request.signal);
+  } catch {
+    return eventsUnavailableResponse();
+  }
+}

app/api/events/directory/route.ts

@@ -0,0 +1,12 @@
+import {
+  createRedisEventResponse,
+  eventsUnavailableResponse,
+} from "@/lib/events/redis-stream";
+
+export async function GET(request: Request) {
+  try {
+    return await createRedisEventResponse("directory", request.signal);
+  } catch {
+    return eventsUnavailableResponse();
+  }
+}

app/api/events/page/[id]/route.ts

@@ -0,0 +1,22 @@
+import {
+  createRedisEventResponse,
+  eventsUnavailableResponse,
+} from "@/lib/events/redis-stream";
+
+const UUID_PATTERN =
+  /^[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/iu;
+
+export async function GET(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  const { id } = await params;
+  if (!UUID_PATTERN.test(id)) {
+    return Response.json({ error: "invalid-page-id" }, { status: 400 });
+  }
+  try {
+    return await createRedisEventResponse(`page:${id}`, request.signal);
+  } catch {
+    return eventsUnavailableResponse();
+  }
+}