89 lines
2.2 KiB
TypeScript
89 lines
2.2 KiB
TypeScript
import { ExcalidrawElement } from "../element/types";
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import { AppState } from "../types";
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import { clearAppStateForLocalStorage } from "../appState";
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import { restore } from "./restore";
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const LOCAL_STORAGE_KEY = "excalidraw";
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const LOCAL_STORAGE_KEY_STATE = "excalidraw-state";
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const LOCAL_STORAGE_KEY_COLLAB = "excalidraw-collab";
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export const saveUsernameToLocalStorage = (username: string) => {
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try {
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localStorage.setItem(
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LOCAL_STORAGE_KEY_COLLAB,
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JSON.stringify({ username }),
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);
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} catch (error) {
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// Unable to access window.localStorage
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console.error(error);
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}
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};
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export const restoreUsernameFromLocalStorage = (): string | null => {
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try {
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const data = localStorage.getItem(LOCAL_STORAGE_KEY_COLLAB);
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if (data) {
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return JSON.parse(data).username;
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}
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} catch (error) {
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// Unable to access localStorage
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console.error(error);
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}
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return null;
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};
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export const saveToLocalStorage = (
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elements: readonly ExcalidrawElement[],
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appState: AppState,
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) => {
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try {
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localStorage.setItem(
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LOCAL_STORAGE_KEY,
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JSON.stringify(elements.filter((element) => !element.isDeleted)),
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);
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localStorage.setItem(
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LOCAL_STORAGE_KEY_STATE,
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JSON.stringify(clearAppStateForLocalStorage(appState)),
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);
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} catch (error) {
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// Unable to access window.localStorage
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console.error(error);
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}
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};
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export const restoreFromLocalStorage = () => {
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let savedElements = null;
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let savedState = null;
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try {
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savedElements = localStorage.getItem(LOCAL_STORAGE_KEY);
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savedState = localStorage.getItem(LOCAL_STORAGE_KEY_STATE);
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} catch (error) {
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// Unable to access localStorage
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console.error(error);
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}
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let elements = [];
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if (savedElements) {
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try {
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elements = JSON.parse(savedElements);
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} catch {
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// Do nothing because elements array is already empty
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}
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}
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let appState = null;
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if (savedState) {
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try {
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appState = JSON.parse(savedState) as AppState;
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// If we're retrieving from local storage, we should not be collaborating
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appState.isCollaborating = false;
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appState.collaborators = new Map();
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} catch {
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// Do nothing because appState is already null
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}
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}
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return restore(elements, appState);
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};
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