67 lines
1.7 KiB
TypeScript
67 lines
1.7 KiB
TypeScript
import * as SecureStore from 'expo-secure-store';
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import * as React from 'react';
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import { Platform } from 'react-native';
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type UseStateHook<T> = [[boolean, T | null], (value: T | null) => void];
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function useAsyncState<T>(
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initialValue: [boolean, T | null] = [true, null],
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): UseStateHook<T> {
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return React.useReducer(
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(state: [boolean, T | null], action: T | null = null): [boolean, T | null] => [false, action],
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initialValue
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) as UseStateHook<T>;
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}
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export async function setStorageItemAsync(key: string, value: string | null) {
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if (Platform.OS === 'web') {
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try {
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if (value === null) {
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localStorage.removeItem(key);
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} else {
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localStorage.setItem(key, value);
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}
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} catch (e) {
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console.error('Local storage is unavailable:', e);
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}
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} else {
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if (value == null) {
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await SecureStore.deleteItemAsync(key);
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} else {
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await SecureStore.setItemAsync(key, value);
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}
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}
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}
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export function useStorageState(key: string): UseStateHook<string> {
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// Public
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const [state, setState] = useAsyncState<string>();
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// Get
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React.useEffect(() => {
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if (Platform.OS === 'web') {
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try {
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if (typeof localStorage !== 'undefined') {
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setState(localStorage.getItem(key));
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}
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} catch (e) {
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console.error('Local storage is unavailable:', e);
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}
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} else {
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SecureStore.getItemAsync(key).then((value: string | null) => {
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setState(value);
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});
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}
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}, [key]);
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// Set
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const setValue = React.useCallback(
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(value: string | null) => {
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setState(value);
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setStorageItemAsync(key, value);
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},
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[key]
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);
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return [state, setValue];
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}
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