42 lines
1.9 KiB
TypeScript
42 lines
1.9 KiB
TypeScript
// Per-device UI preferences (theme, motion, language, onboarding seen). Only conveniences live in localStorage;
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// nothing about projects or accounts.
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export type Theme = 'system' | 'light' | 'dark';
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export type Motion = 'system' | 'reduce';
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export type Lang = 'system' | 'en' | 'tr';
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export interface Prefs { theme: Theme; motion: Motion; lang: Lang; onboarded: boolean }
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export const DEFAULT_PREFS: Prefs = { theme: 'system', motion: 'system', lang: 'system', onboarded: false };
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const KEY = 'storebound.prefs.v1';
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export function parsePrefs(raw: string | null): Prefs {
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try {
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const v = JSON.parse(raw ?? '{}') as Partial<Prefs>;
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return {
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theme: v.theme === 'light' || v.theme === 'dark' ? v.theme : 'system',
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motion: v.motion === 'reduce' ? 'reduce' : 'system',
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lang: v.lang === 'en' || v.lang === 'tr' ? v.lang : 'system',
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onboarded: v.onboarded === true,
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};
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} catch { return { ...DEFAULT_PREFS }; }
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}
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export function loadPrefs(): Prefs {
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try { return parsePrefs(localStorage.getItem(KEY)); } catch { return { ...DEFAULT_PREFS }; }
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}
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export function savePrefs(p: Prefs): void {
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try { localStorage.setItem(KEY, JSON.stringify(p)); } catch { /* private mode: keep it for this run only */ }
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}
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/** Puts the preferences on <html>: data-theme (light / dark, absent = follow the system), data-motion and lang. */
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export function applyPrefs(p: Prefs, root: { dataset: DOMStringMap; lang?: string } = document.documentElement, systemLang = 'en'): void {
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if (p.theme === 'system') delete root.dataset.theme; else root.dataset.theme = p.theme;
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if (p.motion === 'reduce') root.dataset.motion = 'reduce'; else delete root.dataset.motion;
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root.lang = resolveLang(p.lang, systemLang);
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}
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/** The language to show: the preference, else the system's when we have it (tr), else English. */
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export function resolveLang(l: Lang, systemLang: string): 'en' | 'tr' {
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if (l !== 'system') return l;
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return /^tr\b/i.test(systemLang) ? 'tr' : 'en';
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}
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