mirror of
https://github.com/Dvorinka/excalidraw-full.git
synced 2026-06-05 06:32:56 +00:00
init frontend
This commit is contained in:
Yuzhong Zhang
@@ -0,0 +1,997 @@
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import throttle from "lodash.throttle";
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import { PureComponent } from "react";
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import {
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ExcalidrawImperativeAPI,
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SocketId,
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} from "../../packages/excalidraw/types";
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import { ErrorDialog } from "../../packages/excalidraw/components/ErrorDialog";
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import { APP_NAME, ENV, EVENT } from "../../packages/excalidraw/constants";
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import { ImportedDataState } from "../../packages/excalidraw/data/types";
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import {
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ExcalidrawElement,
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InitializedExcalidrawImageElement,
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} from "../../packages/excalidraw/element/types";
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import {
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getSceneVersion,
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restoreElements,
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zoomToFitBounds,
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} from "../../packages/excalidraw/index";
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import { Collaborator, Gesture } from "../../packages/excalidraw/types";
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import {
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assertNever,
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preventUnload,
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resolvablePromise,
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throttleRAF,
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} from "../../packages/excalidraw/utils";
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import {
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CURSOR_SYNC_TIMEOUT,
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FILE_UPLOAD_MAX_BYTES,
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FIREBASE_STORAGE_PREFIXES,
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INITIAL_SCENE_UPDATE_TIMEOUT,
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LOAD_IMAGES_TIMEOUT,
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WS_SUBTYPES,
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SYNC_FULL_SCENE_INTERVAL_MS,
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WS_EVENTS,
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} from "../app_constants";
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import {
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generateCollaborationLinkData,
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getCollaborationLink,
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getSyncableElements,
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SocketUpdateDataSource,
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SyncableExcalidrawElement,
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} from "../data";
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import {
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isSavedToFirebase,
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loadFilesFromFirebase,
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loadFromFirebase,
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saveFilesToFirebase,
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saveToFirebase,
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} from "../data/firebase";
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import {
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importUsernameFromLocalStorage,
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saveUsernameToLocalStorage,
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} from "../data/localStorage";
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import Portal from "./Portal";
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import { t } from "../../packages/excalidraw/i18n";
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import { UserIdleState } from "../../packages/excalidraw/types";
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import {
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IDLE_THRESHOLD,
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ACTIVE_THRESHOLD,
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} from "../../packages/excalidraw/constants";
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import {
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encodeFilesForUpload,
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FileManager,
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updateStaleImageStatuses,
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} from "../data/FileManager";
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import { AbortError } from "../../packages/excalidraw/errors";
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import {
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isImageElement,
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isInitializedImageElement,
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} from "../../packages/excalidraw/element/typeChecks";
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import { newElementWith } from "../../packages/excalidraw/element/mutateElement";
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import {
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ReconciledElements,
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reconcileElements as _reconcileElements,
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} from "./reconciliation";
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import { decryptData } from "../../packages/excalidraw/data/encryption";
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import { resetBrowserStateVersions } from "../data/tabSync";
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import { LocalData } from "../data/LocalData";
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import { atom } from "jotai";
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import { appJotaiStore } from "../app-jotai";
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import { Mutable, ValueOf } from "../../packages/excalidraw/utility-types";
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import { getVisibleSceneBounds } from "../../packages/excalidraw/element/bounds";
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import { withBatchedUpdates } from "../../packages/excalidraw/reactUtils";
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import { collabErrorIndicatorAtom } from "./CollabError";
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export const collabAPIAtom = atom<CollabAPI | null>(null);
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export const isCollaboratingAtom = atom(false);
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export const isOfflineAtom = atom(false);
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interface CollabState {
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errorMessage: string | null;
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/** errors related to saving */
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dialogNotifiedErrors: Record<string, boolean>;
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username: string;
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activeRoomLink: string | null;
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}
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export const activeRoomLinkAtom = atom<string | null>(null);
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type CollabInstance = InstanceType<typeof Collab>;
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export interface CollabAPI {
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/** function so that we can access the latest value from stale callbacks */
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isCollaborating: () => boolean;
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onPointerUpdate: CollabInstance["onPointerUpdate"];
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startCollaboration: CollabInstance["startCollaboration"];
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stopCollaboration: CollabInstance["stopCollaboration"];
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syncElements: CollabInstance["syncElements"];
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fetchImageFilesFromFirebase: CollabInstance["fetchImageFilesFromFirebase"];
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setUsername: CollabInstance["setUsername"];
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getUsername: CollabInstance["getUsername"];
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getActiveRoomLink: CollabInstance["getActiveRoomLink"];
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setCollabError: CollabInstance["setErrorDialog"];
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}
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interface CollabProps {
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excalidrawAPI: ExcalidrawImperativeAPI;
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}
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class Collab extends PureComponent<CollabProps, CollabState> {
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portal: Portal;
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fileManager: FileManager;
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excalidrawAPI: CollabProps["excalidrawAPI"];
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activeIntervalId: number | null;
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idleTimeoutId: number | null;
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private socketInitializationTimer?: number;
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private lastBroadcastedOrReceivedSceneVersion: number = -1;
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private collaborators = new Map<SocketId, Collaborator>();
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constructor(props: CollabProps) {
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super(props);
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this.state = {
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errorMessage: null,
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dialogNotifiedErrors: {},
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username: importUsernameFromLocalStorage() || "",
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activeRoomLink: null,
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};
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this.portal = new Portal(this);
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this.fileManager = new FileManager({
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getFiles: async (fileIds) => {
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const { roomId, roomKey } = this.portal;
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if (!roomId || !roomKey) {
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throw new AbortError();
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}
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return loadFilesFromFirebase(`files/rooms/${roomId}`, roomKey, fileIds);
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},
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saveFiles: async ({ addedFiles }) => {
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const { roomId, roomKey } = this.portal;
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if (!roomId || !roomKey) {
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throw new AbortError();
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}
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return saveFilesToFirebase({
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prefix: `${FIREBASE_STORAGE_PREFIXES.collabFiles}/${roomId}`,
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files: await encodeFilesForUpload({
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files: addedFiles,
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encryptionKey: roomKey,
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maxBytes: FILE_UPLOAD_MAX_BYTES,
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}),
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});
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},
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});
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this.excalidrawAPI = props.excalidrawAPI;
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this.activeIntervalId = null;
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this.idleTimeoutId = null;
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}
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private onUmmount: (() => void) | null = null;
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componentDidMount() {
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window.addEventListener(EVENT.BEFORE_UNLOAD, this.beforeUnload);
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window.addEventListener("online", this.onOfflineStatusToggle);
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window.addEventListener("offline", this.onOfflineStatusToggle);
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window.addEventListener(EVENT.UNLOAD, this.onUnload);
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const unsubOnUserFollow = this.excalidrawAPI.onUserFollow((payload) => {
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this.portal.socket && this.portal.broadcastUserFollowed(payload);
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});
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const throttledRelayUserViewportBounds = throttleRAF(
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this.relayVisibleSceneBounds,
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);
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const unsubOnScrollChange = this.excalidrawAPI.onScrollChange(() =>
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throttledRelayUserViewportBounds(),
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);
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this.onUmmount = () => {
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unsubOnUserFollow();
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unsubOnScrollChange();
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};
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this.onOfflineStatusToggle();
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const collabAPI: CollabAPI = {
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isCollaborating: this.isCollaborating,
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onPointerUpdate: this.onPointerUpdate,
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startCollaboration: this.startCollaboration,
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syncElements: this.syncElements,
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fetchImageFilesFromFirebase: this.fetchImageFilesFromFirebase,
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stopCollaboration: this.stopCollaboration,
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setUsername: this.setUsername,
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getUsername: this.getUsername,
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getActiveRoomLink: this.getActiveRoomLink,
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setCollabError: this.setErrorDialog,
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};
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appJotaiStore.set(collabAPIAtom, collabAPI as any);
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if (import.meta.env.MODE === ENV.TEST || import.meta.env.DEV) {
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window.collab = window.collab || ({} as Window["collab"]);
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Object.defineProperties(window, {
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collab: {
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configurable: true,
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value: this,
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},
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});
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}
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}
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onOfflineStatusToggle = () => {
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appJotaiStore.set(isOfflineAtom, !window.navigator.onLine as any);
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};
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componentWillUnmount() {
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window.removeEventListener("online", this.onOfflineStatusToggle);
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window.removeEventListener("offline", this.onOfflineStatusToggle);
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window.removeEventListener(EVENT.BEFORE_UNLOAD, this.beforeUnload);
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window.removeEventListener(EVENT.UNLOAD, this.onUnload);
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window.removeEventListener(EVENT.POINTER_MOVE, this.onPointerMove);
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window.removeEventListener(
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EVENT.VISIBILITY_CHANGE,
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this.onVisibilityChange,
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);
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if (this.activeIntervalId) {
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window.clearInterval(this.activeIntervalId);
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this.activeIntervalId = null;
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}
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if (this.idleTimeoutId) {
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window.clearTimeout(this.idleTimeoutId);
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this.idleTimeoutId = null;
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}
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this.onUmmount?.();
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}
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isCollaborating = () => appJotaiStore.get(isCollaboratingAtom)!;
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private setIsCollaborating = (isCollaborating: boolean) => {
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appJotaiStore.set(isCollaboratingAtom, isCollaborating as any);
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};
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private onUnload = () => {
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this.destroySocketClient({ isUnload: true });
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};
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private beforeUnload = withBatchedUpdates((event: BeforeUnloadEvent) => {
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const syncableElements = getSyncableElements(
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this.getSceneElementsIncludingDeleted(),
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);
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if (
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this.isCollaborating() &&
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(this.fileManager.shouldPreventUnload(syncableElements) ||
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!isSavedToFirebase(this.portal, syncableElements))
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) {
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// this won't run in time if user decides to leave the site, but
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// the purpose is to run in immediately after user decides to stay
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this.saveCollabRoomToFirebase(syncableElements);
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preventUnload(event);
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}
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});
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saveCollabRoomToFirebase = async (
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syncableElements: readonly SyncableExcalidrawElement[],
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) => {
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try {
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const savedData = await saveToFirebase(
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this.portal,
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syncableElements,
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this.excalidrawAPI.getAppState(),
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);
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this.resetErrorIndicator();
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if (this.isCollaborating() && savedData && savedData.reconciledElements) {
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this.handleRemoteSceneUpdate(
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this.reconcileElements(savedData.reconciledElements),
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);
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}
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} catch (error: any) {
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const errorMessage = /is longer than.*?bytes/.test(error.message)
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? t("errors.collabSaveFailed_sizeExceeded")
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: t("errors.collabSaveFailed");
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if (
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!this.state.dialogNotifiedErrors[errorMessage] ||
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!this.isCollaborating()
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) {
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this.setErrorDialog(errorMessage);
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this.setState({
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dialogNotifiedErrors: {
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...this.state.dialogNotifiedErrors,
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[errorMessage]: true,
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},
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});
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}
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if (this.isCollaborating()) {
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this.setErrorIndicator(errorMessage);
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}
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console.error(error);
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}
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};
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stopCollaboration = (keepRemoteState = true) => {
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this.queueBroadcastAllElements.cancel();
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this.queueSaveToFirebase.cancel();
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this.loadImageFiles.cancel();
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this.resetErrorIndicator(true);
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this.saveCollabRoomToFirebase(
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getSyncableElements(
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this.excalidrawAPI.getSceneElementsIncludingDeleted(),
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),
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);
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if (this.portal.socket && this.fallbackInitializationHandler) {
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this.portal.socket.off(
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"connect_error",
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this.fallbackInitializationHandler,
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);
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}
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if (!keepRemoteState) {
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LocalData.fileStorage.reset();
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this.destroySocketClient();
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} else if (window.confirm(t("alerts.collabStopOverridePrompt"))) {
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// hack to ensure that we prefer we disregard any new browser state
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// that could have been saved in other tabs while we were collaborating
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resetBrowserStateVersions();
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window.history.pushState({}, APP_NAME, window.location.origin);
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this.destroySocketClient();
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LocalData.fileStorage.reset();
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||||
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const elements = this.excalidrawAPI
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||||
.getSceneElementsIncludingDeleted()
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||||
.map((element) => {
|
||||
if (isImageElement(element) && element.status === "saved") {
|
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return newElementWith(element, { status: "pending" });
|
||||
}
|
||||
return element;
|
||||
});
|
||||
|
||||
this.excalidrawAPI.updateScene({
|
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elements,
|
||||
commitToHistory: false,
|
||||
});
|
||||
}
|
||||
};
|
||||
|
||||
private destroySocketClient = (opts?: { isUnload: boolean }) => {
|
||||
this.lastBroadcastedOrReceivedSceneVersion = -1;
|
||||
this.portal.close();
|
||||
this.fileManager.reset();
|
||||
if (!opts?.isUnload) {
|
||||
this.setIsCollaborating(false);
|
||||
this.setActiveRoomLink(null);
|
||||
this.collaborators = new Map();
|
||||
this.excalidrawAPI.updateScene({
|
||||
collaborators: this.collaborators,
|
||||
});
|
||||
LocalData.resumeSave("collaboration");
|
||||
}
|
||||
};
|
||||
|
||||
private fetchImageFilesFromFirebase = async (opts: {
|
||||
elements: readonly ExcalidrawElement[];
|
||||
/**
|
||||
* Indicates whether to fetch files that are errored or pending and older
|
||||
* than 10 seconds.
|
||||
*
|
||||
* Use this as a mechanism to fetch files which may be ok but for some
|
||||
* reason their status was not updated correctly.
|
||||
*/
|
||||
forceFetchFiles?: boolean;
|
||||
}) => {
|
||||
const unfetchedImages = opts.elements
|
||||
.filter((element) => {
|
||||
return (
|
||||
isInitializedImageElement(element) &&
|
||||
!this.fileManager.isFileHandled(element.fileId) &&
|
||||
!element.isDeleted &&
|
||||
(opts.forceFetchFiles
|
||||
? element.status !== "pending" ||
|
||||
Date.now() - element.updated > 10000
|
||||
: element.status === "saved")
|
||||
);
|
||||
})
|
||||
.map((element) => (element as InitializedExcalidrawImageElement).fileId);
|
||||
|
||||
return await this.fileManager.getFiles(unfetchedImages);
|
||||
};
|
||||
|
||||
private decryptPayload = async (
|
||||
iv: Uint8Array,
|
||||
encryptedData: ArrayBuffer,
|
||||
decryptionKey: string,
|
||||
): Promise<ValueOf<SocketUpdateDataSource>> => {
|
||||
try {
|
||||
const decrypted = await decryptData(iv, encryptedData, decryptionKey);
|
||||
|
||||
const decodedData = new TextDecoder("utf-8").decode(
|
||||
new Uint8Array(decrypted),
|
||||
);
|
||||
return JSON.parse(decodedData);
|
||||
} catch (error) {
|
||||
window.alert(t("alerts.decryptFailed"));
|
||||
console.error(error);
|
||||
return {
|
||||
type: WS_SUBTYPES.INVALID_RESPONSE,
|
||||
};
|
||||
}
|
||||
};
|
||||
|
||||
private fallbackInitializationHandler: null | (() => any) = null;
|
||||
|
||||
startCollaboration = async (
|
||||
existingRoomLinkData: null | { roomId: string; roomKey: string },
|
||||
): Promise<ImportedDataState | null> => {
|
||||
if (!this.state.username) {
|
||||
import("@excalidraw/random-username").then(({ getRandomUsername }) => {
|
||||
const username = getRandomUsername();
|
||||
this.setUsername(username);
|
||||
});
|
||||
}
|
||||
|
||||
if (this.portal.socket) {
|
||||
return null;
|
||||
}
|
||||
|
||||
let roomId;
|
||||
let roomKey;
|
||||
|
||||
if (existingRoomLinkData) {
|
||||
({ roomId, roomKey } = existingRoomLinkData);
|
||||
} else {
|
||||
({ roomId, roomKey } = await generateCollaborationLinkData());
|
||||
window.history.pushState(
|
||||
{},
|
||||
APP_NAME,
|
||||
getCollaborationLink({ roomId, roomKey }),
|
||||
);
|
||||
}
|
||||
|
||||
const scenePromise = resolvablePromise<ImportedDataState | null>();
|
||||
|
||||
this.setIsCollaborating(true);
|
||||
LocalData.pauseSave("collaboration");
|
||||
|
||||
const { default: socketIOClient } = await import(
|
||||
/* webpackChunkName: "socketIoClient" */ "socket.io-client"
|
||||
);
|
||||
|
||||
const fallbackInitializationHandler = () => {
|
||||
this.initializeRoom({
|
||||
roomLinkData: existingRoomLinkData,
|
||||
fetchScene: true,
|
||||
}).then((scene) => {
|
||||
scenePromise.resolve(scene);
|
||||
});
|
||||
};
|
||||
this.fallbackInitializationHandler = fallbackInitializationHandler;
|
||||
|
||||
try {
|
||||
this.portal.socket = this.portal.open(
|
||||
socketIOClient(import.meta.env.VITE_APP_WS_SERVER_URL, {
|
||||
transports: ["websocket", "polling"],
|
||||
}),
|
||||
roomId,
|
||||
roomKey,
|
||||
);
|
||||
|
||||
this.portal.socket.once("connect_error", fallbackInitializationHandler);
|
||||
} catch (error: any) {
|
||||
console.error(error);
|
||||
this.setErrorDialog(error.message);
|
||||
return null;
|
||||
}
|
||||
|
||||
if (!existingRoomLinkData) {
|
||||
const elements = this.excalidrawAPI.getSceneElements().map((element) => {
|
||||
if (isImageElement(element) && element.status === "saved") {
|
||||
return newElementWith(element, { status: "pending" });
|
||||
}
|
||||
return element;
|
||||
});
|
||||
// remove deleted elements from elements array & history to ensure we don't
|
||||
// expose potentially sensitive user data in case user manually deletes
|
||||
// existing elements (or clears scene), which would otherwise be persisted
|
||||
// to database even if deleted before creating the room.
|
||||
this.excalidrawAPI.history.clear();
|
||||
this.excalidrawAPI.updateScene({
|
||||
elements,
|
||||
commitToHistory: true,
|
||||
});
|
||||
|
||||
this.saveCollabRoomToFirebase(getSyncableElements(elements));
|
||||
}
|
||||
|
||||
// fallback in case you're not alone in the room but still don't receive
|
||||
// initial SCENE_INIT message
|
||||
this.socketInitializationTimer = window.setTimeout(
|
||||
fallbackInitializationHandler,
|
||||
INITIAL_SCENE_UPDATE_TIMEOUT,
|
||||
);
|
||||
|
||||
// All socket listeners are moving to Portal
|
||||
this.portal.socket.on(
|
||||
"client-broadcast",
|
||||
async (encryptedData: ArrayBuffer, iv: Uint8Array) => {
|
||||
if (!this.portal.roomKey) {
|
||||
return;
|
||||
}
|
||||
|
||||
const decryptedData = await this.decryptPayload(
|
||||
iv,
|
||||
encryptedData,
|
||||
this.portal.roomKey,
|
||||
);
|
||||
|
||||
switch (decryptedData.type) {
|
||||
case WS_SUBTYPES.INVALID_RESPONSE:
|
||||
return;
|
||||
case WS_SUBTYPES.INIT: {
|
||||
if (!this.portal.socketInitialized) {
|
||||
this.initializeRoom({ fetchScene: false });
|
||||
const remoteElements = decryptedData.payload.elements;
|
||||
const reconciledElements = this.reconcileElements(remoteElements);
|
||||
this.handleRemoteSceneUpdate(reconciledElements, {
|
||||
init: true,
|
||||
});
|
||||
// noop if already resolved via init from firebase
|
||||
scenePromise.resolve({
|
||||
elements: reconciledElements,
|
||||
scrollToContent: true,
|
||||
});
|
||||
}
|
||||
break;
|
||||
}
|
||||
case WS_SUBTYPES.UPDATE:
|
||||
this.handleRemoteSceneUpdate(
|
||||
this.reconcileElements(decryptedData.payload.elements),
|
||||
);
|
||||
break;
|
||||
case WS_SUBTYPES.MOUSE_LOCATION: {
|
||||
const { pointer, button, username, selectedElementIds } =
|
||||
decryptedData.payload;
|
||||
|
||||
const socketId: SocketUpdateDataSource["MOUSE_LOCATION"]["payload"]["socketId"] =
|
||||
decryptedData.payload.socketId ||
|
||||
// @ts-ignore legacy, see #2094 (#2097)
|
||||
decryptedData.payload.socketID;
|
||||
|
||||
this.updateCollaborator(socketId, {
|
||||
pointer,
|
||||
button,
|
||||
selectedElementIds,
|
||||
username,
|
||||
});
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case WS_SUBTYPES.USER_VISIBLE_SCENE_BOUNDS: {
|
||||
const { sceneBounds, socketId } = decryptedData.payload;
|
||||
|
||||
const appState = this.excalidrawAPI.getAppState();
|
||||
|
||||
// we're not following the user
|
||||
// (shouldn't happen, but could be late message or bug upstream)
|
||||
if (appState.userToFollow?.socketId !== socketId) {
|
||||
console.warn(
|
||||
`receiving remote client's (from ${socketId}) viewport bounds even though we're not subscribed to it!`,
|
||||
);
|
||||
return;
|
||||
}
|
||||
|
||||
// cross-follow case, ignore updates in this case
|
||||
if (
|
||||
appState.userToFollow &&
|
||||
appState.followedBy.has(appState.userToFollow.socketId)
|
||||
) {
|
||||
return;
|
||||
}
|
||||
|
||||
this.excalidrawAPI.updateScene({
|
||||
appState: zoomToFitBounds({
|
||||
appState,
|
||||
bounds: sceneBounds,
|
||||
fitToViewport: true,
|
||||
viewportZoomFactor: 1,
|
||||
}).appState,
|
||||
});
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case WS_SUBTYPES.IDLE_STATUS: {
|
||||
const { userState, socketId, username } = decryptedData.payload;
|
||||
this.updateCollaborator(socketId, {
|
||||
userState,
|
||||
username,
|
||||
});
|
||||
break;
|
||||
}
|
||||
|
||||
default: {
|
||||
assertNever(decryptedData, null);
|
||||
}
|
||||
}
|
||||
},
|
||||
);
|
||||
|
||||
this.portal.socket.on("first-in-room", async () => {
|
||||
if (this.portal.socket) {
|
||||
this.portal.socket.off("first-in-room");
|
||||
}
|
||||
const sceneData = await this.initializeRoom({
|
||||
fetchScene: true,
|
||||
roomLinkData: existingRoomLinkData,
|
||||
});
|
||||
scenePromise.resolve(sceneData);
|
||||
});
|
||||
|
||||
this.portal.socket.on(
|
||||
WS_EVENTS.USER_FOLLOW_ROOM_CHANGE,
|
||||
(followedBy: SocketId[]) => {
|
||||
this.excalidrawAPI.updateScene({
|
||||
appState: { followedBy: new Set(followedBy) },
|
||||
});
|
||||
|
||||
this.relayVisibleSceneBounds({ force: true });
|
||||
},
|
||||
);
|
||||
|
||||
this.initializeIdleDetector();
|
||||
|
||||
this.setActiveRoomLink(window.location.href);
|
||||
|
||||
return scenePromise;
|
||||
};
|
||||
|
||||
private initializeRoom = async ({
|
||||
fetchScene,
|
||||
roomLinkData,
|
||||
}:
|
||||
| {
|
||||
fetchScene: true;
|
||||
roomLinkData: { roomId: string; roomKey: string } | null;
|
||||
}
|
||||
| { fetchScene: false; roomLinkData?: null }) => {
|
||||
clearTimeout(this.socketInitializationTimer!);
|
||||
if (this.portal.socket && this.fallbackInitializationHandler) {
|
||||
this.portal.socket.off(
|
||||
"connect_error",
|
||||
this.fallbackInitializationHandler,
|
||||
);
|
||||
}
|
||||
if (fetchScene && roomLinkData && this.portal.socket) {
|
||||
this.excalidrawAPI.resetScene();
|
||||
|
||||
try {
|
||||
const elements = await loadFromFirebase(
|
||||
roomLinkData.roomId,
|
||||
roomLinkData.roomKey,
|
||||
this.portal.socket,
|
||||
);
|
||||
if (elements) {
|
||||
this.setLastBroadcastedOrReceivedSceneVersion(
|
||||
getSceneVersion(elements),
|
||||
);
|
||||
|
||||
return {
|
||||
elements,
|
||||
scrollToContent: true,
|
||||
};
|
||||
}
|
||||
} catch (error: any) {
|
||||
// log the error and move on. other peers will sync us the scene.
|
||||
console.error(error);
|
||||
} finally {
|
||||
this.portal.socketInitialized = true;
|
||||
}
|
||||
} else {
|
||||
this.portal.socketInitialized = true;
|
||||
}
|
||||
return null;
|
||||
};
|
||||
|
||||
private reconcileElements = (
|
||||
remoteElements: readonly ExcalidrawElement[],
|
||||
): ReconciledElements => {
|
||||
const localElements = this.getSceneElementsIncludingDeleted();
|
||||
const appState = this.excalidrawAPI.getAppState();
|
||||
|
||||
remoteElements = restoreElements(remoteElements, null);
|
||||
|
||||
const reconciledElements = _reconcileElements(
|
||||
localElements,
|
||||
remoteElements,
|
||||
appState,
|
||||
);
|
||||
|
||||
// Avoid broadcasting to the rest of the collaborators the scene
|
||||
// we just received!
|
||||
// Note: this needs to be set before updating the scene as it
|
||||
// synchronously calls render.
|
||||
this.setLastBroadcastedOrReceivedSceneVersion(
|
||||
getSceneVersion(reconciledElements),
|
||||
);
|
||||
|
||||
return reconciledElements;
|
||||
};
|
||||
|
||||
private loadImageFiles = throttle(async () => {
|
||||
const { loadedFiles, erroredFiles } =
|
||||
await this.fetchImageFilesFromFirebase({
|
||||
elements: this.excalidrawAPI.getSceneElementsIncludingDeleted(),
|
||||
});
|
||||
|
||||
this.excalidrawAPI.addFiles(loadedFiles);
|
||||
|
||||
updateStaleImageStatuses({
|
||||
excalidrawAPI: this.excalidrawAPI,
|
||||
erroredFiles,
|
||||
elements: this.excalidrawAPI.getSceneElementsIncludingDeleted(),
|
||||
});
|
||||
}, LOAD_IMAGES_TIMEOUT);
|
||||
|
||||
private handleRemoteSceneUpdate = (
|
||||
elements: ReconciledElements,
|
||||
{ init = false }: { init?: boolean } = {},
|
||||
) => {
|
||||
this.excalidrawAPI.updateScene({
|
||||
elements,
|
||||
commitToHistory: !!init,
|
||||
});
|
||||
|
||||
// We haven't yet implemented multiplayer undo functionality, so we clear the undo stack
|
||||
// when we receive any messages from another peer. This UX can be pretty rough -- if you
|
||||
// undo, a user makes a change, and then try to redo, your element(s) will be lost. However,
|
||||
// right now we think this is the right tradeoff.
|
||||
this.excalidrawAPI.history.clear();
|
||||
|
||||
this.loadImageFiles();
|
||||
};
|
||||
|
||||
private onPointerMove = () => {
|
||||
if (this.idleTimeoutId) {
|
||||
window.clearTimeout(this.idleTimeoutId);
|
||||
this.idleTimeoutId = null;
|
||||
}
|
||||
|
||||
this.idleTimeoutId = window.setTimeout(this.reportIdle, IDLE_THRESHOLD);
|
||||
|
||||
if (!this.activeIntervalId) {
|
||||
this.activeIntervalId = window.setInterval(
|
||||
this.reportActive,
|
||||
ACTIVE_THRESHOLD,
|
||||
);
|
||||
}
|
||||
};
|
||||
|
||||
private onVisibilityChange = () => {
|
||||
if (document.hidden) {
|
||||
if (this.idleTimeoutId) {
|
||||
window.clearTimeout(this.idleTimeoutId);
|
||||
this.idleTimeoutId = null;
|
||||
}
|
||||
if (this.activeIntervalId) {
|
||||
window.clearInterval(this.activeIntervalId);
|
||||
this.activeIntervalId = null;
|
||||
}
|
||||
this.onIdleStateChange(UserIdleState.AWAY);
|
||||
} else {
|
||||
this.idleTimeoutId = window.setTimeout(this.reportIdle, IDLE_THRESHOLD);
|
||||
this.activeIntervalId = window.setInterval(
|
||||
this.reportActive,
|
||||
ACTIVE_THRESHOLD,
|
||||
);
|
||||
this.onIdleStateChange(UserIdleState.ACTIVE);
|
||||
}
|
||||
};
|
||||
|
||||
private reportIdle = () => {
|
||||
this.onIdleStateChange(UserIdleState.IDLE);
|
||||
if (this.activeIntervalId) {
|
||||
window.clearInterval(this.activeIntervalId);
|
||||
this.activeIntervalId = null;
|
||||
}
|
||||
};
|
||||
|
||||
private reportActive = () => {
|
||||
this.onIdleStateChange(UserIdleState.ACTIVE);
|
||||
};
|
||||
|
||||
private initializeIdleDetector = () => {
|
||||
document.addEventListener(EVENT.POINTER_MOVE, this.onPointerMove);
|
||||
document.addEventListener(EVENT.VISIBILITY_CHANGE, this.onVisibilityChange);
|
||||
};
|
||||
|
||||
setCollaborators(sockets: SocketId[]) {
|
||||
const collaborators: InstanceType<typeof Collab>["collaborators"] =
|
||||
new Map();
|
||||
for (const socketId of sockets) {
|
||||
collaborators.set(
|
||||
socketId,
|
||||
Object.assign({}, this.collaborators.get(socketId), {
|
||||
isCurrentUser: socketId === this.portal.socket?.id,
|
||||
}),
|
||||
);
|
||||
}
|
||||
this.collaborators = collaborators;
|
||||
this.excalidrawAPI.updateScene({ collaborators });
|
||||
}
|
||||
|
||||
updateCollaborator = (socketId: SocketId, updates: Partial<Collaborator>) => {
|
||||
const collaborators = new Map(this.collaborators);
|
||||
const user: Mutable<Collaborator> = Object.assign(
|
||||
{},
|
||||
collaborators.get(socketId),
|
||||
updates,
|
||||
{
|
||||
isCurrentUser: socketId === this.portal.socket?.id,
|
||||
},
|
||||
);
|
||||
collaborators.set(socketId, user);
|
||||
this.collaborators = collaborators;
|
||||
|
||||
this.excalidrawAPI.updateScene({
|
||||
collaborators,
|
||||
});
|
||||
};
|
||||
|
||||
public setLastBroadcastedOrReceivedSceneVersion = (version: number) => {
|
||||
this.lastBroadcastedOrReceivedSceneVersion = version;
|
||||
};
|
||||
|
||||
public getLastBroadcastedOrReceivedSceneVersion = () => {
|
||||
return this.lastBroadcastedOrReceivedSceneVersion;
|
||||
};
|
||||
|
||||
public getSceneElementsIncludingDeleted = () => {
|
||||
return this.excalidrawAPI.getSceneElementsIncludingDeleted();
|
||||
};
|
||||
|
||||
onPointerUpdate = throttle(
|
||||
(payload: {
|
||||
pointer: SocketUpdateDataSource["MOUSE_LOCATION"]["payload"]["pointer"];
|
||||
button: SocketUpdateDataSource["MOUSE_LOCATION"]["payload"]["button"];
|
||||
pointersMap: Gesture["pointers"];
|
||||
}) => {
|
||||
payload.pointersMap.size < 2 &&
|
||||
this.portal.socket &&
|
||||
this.portal.broadcastMouseLocation(payload);
|
||||
},
|
||||
CURSOR_SYNC_TIMEOUT,
|
||||
);
|
||||
|
||||
relayVisibleSceneBounds = (props?: { force: boolean }) => {
|
||||
const appState = this.excalidrawAPI.getAppState();
|
||||
|
||||
if (this.portal.socket && (appState.followedBy.size > 0 || props?.force)) {
|
||||
this.portal.broadcastVisibleSceneBounds(
|
||||
{
|
||||
sceneBounds: getVisibleSceneBounds(appState),
|
||||
},
|
||||
`follow@${this.portal.socket.id}`,
|
||||
);
|
||||
}
|
||||
};
|
||||
|
||||
onIdleStateChange = (userState: UserIdleState) => {
|
||||
this.portal.broadcastIdleChange(userState);
|
||||
};
|
||||
|
||||
broadcastElements = (elements: readonly ExcalidrawElement[]) => {
|
||||
if (
|
||||
getSceneVersion(elements) >
|
||||
this.getLastBroadcastedOrReceivedSceneVersion()
|
||||
) {
|
||||
this.portal.broadcastScene(WS_SUBTYPES.UPDATE, elements, false);
|
||||
this.lastBroadcastedOrReceivedSceneVersion = getSceneVersion(elements);
|
||||
this.queueBroadcastAllElements();
|
||||
}
|
||||
};
|
||||
|
||||
syncElements = (elements: readonly ExcalidrawElement[]) => {
|
||||
this.broadcastElements(elements);
|
||||
this.queueSaveToFirebase();
|
||||
};
|
||||
|
||||
queueBroadcastAllElements = throttle(() => {
|
||||
this.portal.broadcastScene(
|
||||
WS_SUBTYPES.UPDATE,
|
||||
this.excalidrawAPI.getSceneElementsIncludingDeleted(),
|
||||
true,
|
||||
);
|
||||
const currentVersion = this.getLastBroadcastedOrReceivedSceneVersion();
|
||||
const newVersion = Math.max(
|
||||
currentVersion,
|
||||
getSceneVersion(this.getSceneElementsIncludingDeleted()),
|
||||
);
|
||||
this.setLastBroadcastedOrReceivedSceneVersion(newVersion);
|
||||
}, SYNC_FULL_SCENE_INTERVAL_MS);
|
||||
|
||||
queueSaveToFirebase = throttle(
|
||||
() => {
|
||||
if (this.portal.socketInitialized) {
|
||||
this.saveCollabRoomToFirebase(
|
||||
getSyncableElements(
|
||||
this.excalidrawAPI.getSceneElementsIncludingDeleted(),
|
||||
),
|
||||
);
|
||||
}
|
||||
},
|
||||
SYNC_FULL_SCENE_INTERVAL_MS,
|
||||
{ leading: false },
|
||||
);
|
||||
|
||||
setUsername = (username: string) => {
|
||||
this.setState({ username });
|
||||
saveUsernameToLocalStorage(username);
|
||||
};
|
||||
|
||||
getUsername = () => this.state.username;
|
||||
|
||||
setActiveRoomLink = (activeRoomLink: string | null) => {
|
||||
this.setState({ activeRoomLink });
|
||||
appJotaiStore.set(activeRoomLinkAtom, activeRoomLink as any);
|
||||
};
|
||||
|
||||
getActiveRoomLink = () => this.state.activeRoomLink;
|
||||
|
||||
setErrorIndicator = (errorMessage: string | null) => {
|
||||
appJotaiStore.set(collabErrorIndicatorAtom, {
|
||||
message: errorMessage,
|
||||
nonce: Date.now(),
|
||||
} as any);
|
||||
};
|
||||
|
||||
resetErrorIndicator = (resetDialogNotifiedErrors = false) => {
|
||||
appJotaiStore.set(collabErrorIndicatorAtom, { message: null, nonce: 0 } as any);
|
||||
if (resetDialogNotifiedErrors) {
|
||||
this.setState({
|
||||
dialogNotifiedErrors: {},
|
||||
});
|
||||
}
|
||||
};
|
||||
|
||||
setErrorDialog = (errorMessage: string | null) => {
|
||||
this.setState({
|
||||
errorMessage,
|
||||
});
|
||||
};
|
||||
|
||||
render() {
|
||||
const { errorMessage } = this.state;
|
||||
|
||||
return (
|
||||
<>
|
||||
{errorMessage != null && (
|
||||
<ErrorDialog onClose={() => this.setErrorDialog(null)}>
|
||||
{errorMessage}
|
||||
</ErrorDialog>
|
||||
)}
|
||||
</>
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
declare global {
|
||||
interface Window {
|
||||
collab: InstanceType<typeof Collab>;
|
||||
}
|
||||
}
|
||||
|
||||
if (import.meta.env.MODE === ENV.TEST || import.meta.env.DEV) {
|
||||
window.collab = window.collab || ({} as Window["collab"]);
|
||||
}
|
||||
|
||||
export default Collab;
|
||||
|
||||
export type TCollabClass = Collab;
|
||||
Reference in New Issue
Block a user