| /* |
| * Copyright (C) 2022 Savoir-faire Linux Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as |
| * published by the Free Software Foundation; either version 3 of the |
| * License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public |
| * License along with this program. If not, see |
| * <https://www.gnu.org/licenses/>. |
| */ |
| import { PaletteMode } from '@mui/material'; |
| import { ThemeProvider } from '@mui/material/styles'; |
| import useMediaQuery from '@mui/material/useMediaQuery'; |
| import { createContext, useCallback, useEffect, useMemo, useState } from 'react'; |
| |
| import { buildDefaultTheme } from '../themes/Default'; |
| import { WithChildren } from '../utils/utils'; |
| |
| interface ICustomThemeContext { |
| mode: PaletteMode; |
| toggleMode: () => void; |
| } |
| |
| export const CustomThemeContext = createContext<ICustomThemeContext>(undefined!); |
| |
| export default ({ children }: WithChildren) => { |
| const [mode, setMode] = useState<PaletteMode>('light'); |
| const prefersDarkMode = useMediaQuery('(prefers-color-scheme: dark)'); |
| |
| useEffect(() => { |
| const themeModeInStorage = localStorage.getItem('themeMode'); |
| let themeModeValue = 'light'; |
| // localStorage returns null if no value is found for the given key |
| if (typeof themeModeInStorage === 'string') { |
| themeModeValue = JSON.parse(themeModeInStorage); |
| setMode(themeModeValue === 'dark' ? 'dark' : 'light'); |
| } else { |
| //when there is no theme mode stored in the localStorage, use the mode in OS preference |
| setMode(prefersDarkMode ? 'dark' : 'light'); |
| } |
| }, [prefersDarkMode]); |
| |
| const toggleMode = useCallback(() => { |
| setMode((mode) => { |
| const newMode = mode === 'light' ? 'dark' : 'light'; |
| localStorage.setItem('themeMode', JSON.stringify(newMode)); |
| return newMode; |
| }); |
| }, [setMode]); |
| |
| const theme = useMemo(() => buildDefaultTheme(mode), [mode]); |
| |
| const value = useMemo( |
| () => ({ |
| mode, |
| toggleMode, |
| }), |
| [mode, toggleMode] |
| ); |
| |
| return ( |
| <CustomThemeContext.Provider value={value}> |
| <ThemeProvider theme={theme}>{children}</ThemeProvider> |
| </CustomThemeContext.Provider> |
| ); |
| }; |