Add private chat to multiplayer rooms

lib/multiplayer-api.ts

@@ -11,6 +11,7 @@ import {
   joinRoomSchema,
   roomRoundSchema,
   roomGuessSchema,
+  chatMessageSchema,
   type RoomView,
 } from "../shared/multiplayer";
 import {
@@ -68,6 +69,29 @@ export async function multiplayerApi(
   }
   const id = z.string().uuid().parse(path[1]);
   const action = path[2] ?? "view";
+  if (
+    action === "chat" &&
+    path.length === 3 &&
+    ["GET", "POST"].includes(request.method)
+  ) {
+    if (!savedSecret)
+      throw new ServiceError("Chat permission requires joining this room", 403);
+    const body =
+      request.method === "POST"
+        ? chatMessageSchema.parse(await jsonBody(request))
+        : null;
+    if (body) await limit("multiplayer:chat:" + accessHash, 60, 60);
+    return respond(
+      required(
+        await client.rpc("multiplayer_chat", {
+          p_room: id,
+          p_access_hash: accessHash,
+          p_text: body?.text ?? null,
+          p_client_id: body?.clientId ?? null,
+        }),
+      ),
+    );
+  }
   let payload: Record<string, string | number> = {};
   if (request.method === "POST" && path.length === 3) {
     const input = await jsonBody(request);