| 1 | import { DEFAULT_NAMES, DEFAULT_RULES, type Rules } from './types'; |
| 2 | |
| 3 | const KEY = 'taiwanese-mahjong/prefs'; |
| 4 | |
| 5 | /** |
| 6 | * Bump when a new switch should start from its default rather than from |
| 7 | * whatever an older build happened to write. Preferences are saved on load, so |
| 8 | * a switch that shipped off and was then turned on by default would otherwise |
| 9 | * stay off forever for anyone who had already opened the game once. |
| 10 | * |
| 11 | * Only the audio settings are reset; names and house rules are things somebody |
| 12 | * actually chose, and they carry across. |
| 13 | */ |
| 14 | const AUDIO_GENERATION = 2; |
| 15 | |
| 16 | /** |
| 17 | * Preferences belong to the table, not to a hand: they outlive a save, survive |
| 18 | * 開新局, and are what a fresh `Game` is built from. |
| 19 | */ |
| 20 | export interface Prefs { |
| 21 | /** Which set of audio defaults this was last saved against. */ |
| 22 | audioGeneration: number; |
| 23 | /** Master mute. */ |
| 24 | sound: boolean; |
| 25 | /** 0..1 */ |
| 26 | volume: number; |
| 27 | /** 報牌 — say the calls and the discarded tiles out loud. Needs `sound`. */ |
| 28 | voice: boolean; |
| 29 | names: string[]; |
| 30 | rules: Rules; |
| 31 | } |
| 32 | |
| 33 | export const DEFAULT_PREFS: Prefs = { |
| 34 | audioGeneration: AUDIO_GENERATION, |
| 35 | sound: true, |
| 36 | volume: 0.7, |
| 37 | voice: true, |
| 38 | names: DEFAULT_NAMES, |
| 39 | rules: DEFAULT_RULES, |
| 40 | }; |
| 41 | |
| 42 | export function loadPrefs(): Prefs { |
| 43 | try { |
| 44 | const raw = localStorage.getItem(KEY); |
| 45 | if (!raw) return DEFAULT_PREFS; |
| 46 | const p = JSON.parse(raw) as Partial<Prefs>; |
| 47 | const stale = p.audioGeneration !== AUDIO_GENERATION; |
| 48 | return { |
| 49 | audioGeneration: AUDIO_GENERATION, |
| 50 | sound: !stale && typeof p.sound === 'boolean' ? p.sound : DEFAULT_PREFS.sound, |
| 51 | volume: clamp(typeof p.volume === 'number' ? p.volume : DEFAULT_PREFS.volume, 0, 1), |
| 52 | voice: !stale && typeof p.voice === 'boolean' ? p.voice : DEFAULT_PREFS.voice, |
| 53 | names: |
| 54 | Array.isArray(p.names) && p.names.length === 4 && p.names.every((n) => typeof n === 'string') |
| 55 | ? p.names |
| 56 | : DEFAULT_NAMES, |
| 57 | rules: { ...DEFAULT_RULES, ...(p.rules ?? {}) }, |
| 58 | }; |
| 59 | } catch { |
| 60 | return DEFAULT_PREFS; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | export function savePrefs(p: Prefs) { |
| 65 | try { |
| 66 | localStorage.setItem(KEY, JSON.stringify(p)); |
| 67 | } catch { |
| 68 | // Storage unavailable — the settings just don't outlive the tab. |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | export const clamp = (n: number, lo: number, hi: number) => Math.min(hi, Math.max(lo, n)); |