Loading Storage

Listen to when a room is deleted so that when the same room is re-created, users can resume from the same storage as where they left off.

Add listeners

1// server/io.ts
2
3import { createIO } from "@pluv/io";
4import { platformNode } from "@pluv/platform-node";
5import { db } from "./db";
6
7export const io = createIO({
8    // Load storage for a newly created room.
9    initialStorage: async (room: string) => {
10        const existingRoom = await db.room.findUnique({ where: { room } });
11
12        return existingRoom?.encodedState ?? null;
13    },
14    platform: platformNode(),
15    // Before the room is destroyed, persist the state to a database
16    // to load when the room is re-created.
17    onRoomDeleted: async (room: string, encodedState: string) => {
18        await db.room.upsert({
19            where: { room },
20            create: { encodedState, room },
21            update: { encodedState },
22        });
23    },
24    // It is unnecessary to save the storage state in this listener.
25    // If a room already exists, users will load the currently active
26    // storage before the storage from initialStorage.
27    onStorageUpdated: (room: string, encodedState: string) => {
28        console.log(room, encodedState);
29    },
30});