57 lines
1.7 KiB
TypeScript
57 lines
1.7 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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import {ThemeTypes} from '~/Constants';
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type ThemeValue = (typeof ThemeTypes)[keyof typeof ThemeTypes];
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type ExplicitTheme = typeof ThemeTypes.DARK | typeof ThemeTypes.LIGHT | typeof ThemeTypes.COAL;
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const STORAGE_KEY = 'theme';
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const EXPLICIT_THEMES = new Set<ThemeValue>([ThemeTypes.DARK, ThemeTypes.LIGHT, ThemeTypes.COAL]);
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export function isExplicitTheme(theme: string | null | undefined): theme is ExplicitTheme {
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return typeof theme === 'string' && EXPLICIT_THEMES.has(theme as ThemeValue);
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}
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export async function loadTheme(): Promise<ExplicitTheme | null> {
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try {
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if (!('localStorage' in window)) {
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return null;
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}
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const stored = window.localStorage.getItem(STORAGE_KEY);
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return isExplicitTheme(stored) ? stored : null;
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} catch {
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return null;
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}
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}
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export async function persistTheme(theme: string | null | undefined): Promise<void> {
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try {
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if (!isExplicitTheme(theme)) {
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return;
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}
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if (!('localStorage' in window)) {
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return;
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}
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window.localStorage.setItem(STORAGE_KEY, theme);
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} catch {}
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}
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