API Reference

createClient

Returns a PluvClient instance

This is a re-export of createClient from @pluv/client.

createBundle

Returns a CreateBundle instance

Creates a bundle to be able to access the PluvClient and PluvRoom from various react hooks.

import { createBundle createClient } from "@pluv/react";
import { yjs } from "@pluv/crdt-yjs";

const io = createClient({
    // ...
});

// Destructured room bundle
export const {
    // components
    MockedRoomProvider,
    PluvProvider,
    PluvRoomProvider,

    // utils
    event,

    // hooks
    useBroadcast,
    useCanRedo,
    useCanUndo,
    useClient,
    useConnection,
    useDoc,
    useEvent,
    useMyPresence,
    useMyself,
    useOther,
    useOthers,
    useRedo,
    useRoom,
    useStorage,
    useTransact,
    useUndo,
} = createBundle(io);

CreateBundle

This is the bundle returned from createBundle.

React provider component to mock PluvRoomProvider. Enables hooks from CreateBundle while completely offline. This can be useful in Storybook within a storybook decorator when mocking PluvRoomProvider.

import { yjs } from "@pluv/crdt-yjs";
import { MockedRoomProvider } from "./io";

const MyComponent: FC = () => {
    return (
        <MockedRoomProvider
            /**
             * @description Mock events sent and received for hooks in child components.
             */
            // 
            events={{
                EMIT_EMOJI: ({ emojiCode }) => ({
                    EMOJI_RECEIVED: { emojiCode },
                }),
            }}
            /**
             * @optional
             * @description Define your initial presence
             */
            initialPresence={{
                selectionId: null,
            }}
            /**
             * @optional
             * @description Define the initial storage for the room, as well as the CRDT to use
             */
            initialStorage={() => ({
                messages: yjs.array(),
            })}
            /**
             * @required
             * @description Set the room id
             */
            room="my-mock-room"
        >
            {children}
        </MockedRoomProvider>
    );
};

PluvProvider

React provider component to allow the PluvClient created by createClient to be accessible in child components via useClient. This is identical to importing the created client, so this is primarily useful for dependency injection when testing.

<PluvProvider>{children}</PluvProvider>

PluvRoomProvider

React provider component to enable CreateBundle hooks within child components. Mounting this component connects to a real-time room with other connected users. Unmounting this component will disconnect the room. See Create Rooms for more details.

import { yjs } from "@pluv/crdt-yjs";
import { MockedRoomProvider } from "./io";

const MyComponent: FC = () => {
    return (
        <PluvRoomProvider
            /**
             * @optional
             * @description Define the user's initial presence
             */
            initialPresence={{
                selectionId: null,
            }}
            /**
             * @optional
             * @description Define the initial storage for the room
             */
            initialStorage={() => ({
                messages: yjs.array(),
            })}
            /**
             * @optional
             * @description Emits an error whenever authorization fails, for
             * monitoring or debugging purposes
             */
            onAuthorizationFail={(error: Error) => {
                console.error(error);
            }}
            /**
             * @required
             * @description Set the room id
             */
            room="my-room-id"
        >
            {children}
        </PluvRoomProvider>
    );
};

event

Returns EventProxy

Defines an event listener client for events broadcasted by connected clients. See useEvent for more details.

// The below 2 statements are equivalent
useEvent("receiveMessage", ({ data }) => {
    console.log(data.message);
});

event.receiveMessage.useEvent(({ data }) => {
    console.log(data.message);
});

useBroadcast

Returns BroadcastProxy

Returns a broadcast function to emit an event and data to all connected clients. This is type-safe. The first parameter event will be the name of the event procedure specified when creating your PluvProcedure instance, and the second parameter data will be the associated input type. See Define Events for more details.

const broadcast = useBroadcast();

// The below 2 statements are equivalent
broadcast("sendMessage", { message:  "Hello world~!" });

broadcast.sendMessage({ message: "Hello world~!" });

useCanRedo

Returns boolean

Checks whether calling PluvRoom.redo will mutate storage.

const canRedo: boolean = useCanRedo();

useCanUndo

Returns boolean

Checks whether calling PluvRoom.undo will mutate storage.

const canUndo: boolean = useCanUndo();

useClient

Returns PluvClient

Returns the PluvClient that was created via createClient.

useConnection

Returns WebSocketConnection

Returns the websocket connection start of the current user.

const connection = useConnection();
//    ^? const connection: {
//        id: string | null;
//        state: ConnectionState;
//    }

useDoc

Returns AbstractCrdtDoc

This returns an instance of the AbstractCrdtDoc that holds the underlying CRDT doc. For instance, when using @pluv/crdt-yjs, this will hold a yjs doc in its value property.

import { yjs } from "@pluv/crdt-yjs";
import { Doc as YDoc } from "yjs";

const doc: yjs.CrdtYjsDoc<any> = useDoc();
const ydoc: YDoc = doc.value;

useEvent

Returns void

Defines a listener for events broadcasted by connected clients. This is type-safe. The first parameter event is the name of the event to listen to from your backend PluvIO instance. The second parameter is a callback containing the data emitted from the broadcasted event.

useEvent("EMOJI_RECEIVED", ({ emojiCode }) => {
    console.log(emojiCode);
});

useMyPresence

Returns [myPresence: TPresence | null, updatePresence: Function]

Returns the current user's presence, and a function to update the user's presence. Using this hook rerenders the component based on a deep-equality check on the user's presence value. This hook accepts a selector to return a modified presence to reduce rerenders.

const io = createClient({
    presence: z.object({
        selectionId: z.string().nullable(),
        selectionColor: z.string(),
    }),
    // ...
});

// ...

const { useMyPresence } = createBundle(io);

const [
    // the user's presence
    myPresence,
    // a presence updater function
    updateMyPresence
] = useMyPresence();

// update individual base properties
updateMyPresence({ selectionId: "name-input" });
updateMyPresence({ selectionColor: "#123456" });

// update multiple base properties
updateMyPresence({
    selectionId: "name-input",
    selectionColor: "#123456",
});

// if you only need a partial presence
const [myPresence] = useMyPresence(({ selectionId }) => selectionId);

// if you don't need presence, and just want the updater
const [, updateMyPresence] = useMyPresence(
    // set selector to return a stable value
    () => true
);

useMyself

Returns UserInfo | null

Returns the user-info object for the current user. This hook accepts a selector to return a modified user-info to reduce rerenders.

const myself = useMyself();

// if you don't need the entire user-info
const myself = useMyself(({ connectionId }) => connectionId);

useOther

Returns UserInfo | null

Returns the user-info object for a connected user by connectionId string.

const other = useOther();

// if you don't need the entire user-info
const other = useOther(({ connectionId }) => connectionId);

useOthers

Returns readonly UserInfo[]

Returns all user-info objects for all connected users. This may trigger a lot of re-renders if presence updates frequently.

Note Consider using this hook only for deriving others' connectionId values to pass into useOther.

const others = useOthers();

// if you want to just pull out connectionId properties
const connectionIds = useOthers((others) => {
    return others.map(({ connectionId }) => connectionId);
});

useRedo

Returns void

Re-applies the last mutation that was undone via PluvRoom.undo.

For more information see: History

const redo = useRedo();

redo();

useStorage

Returns [TData | null, AbstractCrdtType | null]

Returns a base-level property of our CRDT storage as a serialized value and a @pluv/crdt AbstractCrdtType that holds a shared type of our specified CRDT. The component is re-rendered whenever the AbstractCrdtType is updated. The returned values are null while the room is still connecting or initializing its storage.

import { yjs } from "@pluv/crdt-yjs";

const io = createClient({
    initialStorage: yjs.doc(() => ({
        messages: yjs.array(["hello"]),
    })),
    // ...
});

// ...

const { useStorage } = createBundle(io);

const [messages, sharedType] = useStorage("messages");

sharedType.push(["world~!"]);

messages.map((message, key) => <div key={key}>{message}</div>);

useTransact

Returns void

Performs a mutation that can be tracked as an operation to be undone/redone (undo/redo). When called without an origin, the origin will default to the user's connection id.

You can specify a 2nd parameter to transact with a different transaction origin.

For more information see: History

const [messages, sharedType] = useStorage("messages");
const transact = useTransact();

transact((tx) => {
    sharedType.push(["hello world!"]);

    // Alternatively, access your storage from here
    tx.messages.push(["hello world!"]);
});

// This will also be undoable if `"user-123"` is a tracked origin.
transact(() => {
    sharedType.push(["hello world!"]);
}, "user-123");

useUndo

Returns void

Undoes the last mutation that was applied via PluvRoom.transact.

For more information see: History

const undo = useUndo();

undo();