forked from Github/frigate
111
web-old/src/context/index.jsx
Normal file
111
web-old/src/context/index.jsx
Normal file
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import { h, createContext } from 'preact';
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import { get as getData, set as setData } from 'idb-keyval';
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import { useCallback, useContext, useEffect, useLayoutEffect, useState } from 'preact/hooks';
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const DarkMode = createContext(null);
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export function DarkModeProvider({ children }) {
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const [persistedMode, setPersistedMode] = useState(null);
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const [currentMode, setCurrentMode] = useState(persistedMode !== 'media' ? persistedMode : null);
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const setDarkMode = useCallback(
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(value) => {
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setPersistedMode(value);
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setData('darkmode', value);
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setCurrentMode(value);
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},
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[setPersistedMode]
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);
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useEffect(() => {
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async function load() {
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const darkmode = await getData('darkmode');
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setDarkMode(darkmode || 'media');
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}
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load();
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}, [setDarkMode]);
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const handleMediaMatch = useCallback(
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({ matches }) => {
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if (matches) {
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setCurrentMode('dark');
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} else {
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setCurrentMode('light');
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}
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},
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[setCurrentMode]
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);
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useEffect(() => {
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if (persistedMode !== 'media') {
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return;
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}
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const query = window.matchMedia('(prefers-color-scheme: dark)');
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query.addEventListener('change', handleMediaMatch);
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handleMediaMatch(query);
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}, [persistedMode, handleMediaMatch]);
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useLayoutEffect(() => {
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if (currentMode === 'dark') {
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document.body.classList.add('dark');
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} else {
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document.body.classList.remove('dark');
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}
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}, [currentMode]);
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return !persistedMode ? null : (
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<DarkMode.Provider value={{ currentMode, persistedMode, setDarkMode }}>{children}</DarkMode.Provider>
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);
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}
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export function useDarkMode() {
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return useContext(DarkMode);
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}
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const Drawer = createContext(null);
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export function DrawerProvider({ children }) {
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const [showDrawer, setShowDrawer] = useState(false);
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return <Drawer.Provider value={{ showDrawer, setShowDrawer }}>{children}</Drawer.Provider>;
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}
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export function useDrawer() {
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return useContext(Drawer);
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}
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export function usePersistence(key, defaultValue = undefined) {
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const [value, setInternalValue] = useState(defaultValue);
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const [loaded, setLoaded] = useState(false);
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const setValue = useCallback(
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(value) => {
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setInternalValue(value);
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async function update() {
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await setData(key, value);
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}
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update();
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},
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[key]
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);
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useEffect(() => {
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setLoaded(false);
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setInternalValue(defaultValue);
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async function load() {
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const value = await getData(key);
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if (typeof value !== 'undefined') {
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setValue(value);
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}
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setLoaded(true);
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}
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load();
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}, [key, defaultValue, setValue]);
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return [value, setValue, loaded];
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}
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