// SPDX-License-Identifier: MIT OR Apache-2.0
// Copyright (c) 2025 Pierre Fitness Intelligence
// ABOUTME: React Native specific language switcher hook with AsyncStorage
// ABOUTME: Provides persistent language storage for mobile apps
import { useEffect, useCallback } from 'react';
import AsyncStorage from '@react-native-async-storage/async-storage';
import { useTranslation } from './types';
import type { SupportedLanguage } from './config';
export interface LanguageSwitcherOptions {
storageKey?: string;
onLanguageChange?: (language: SupportedLanguage) => void;
}
/**
* Hook for managing language switching with AsyncStorage persistence
* @param options Configuration options for the language switcher
*/
export function useLanguageSwitcherNative(options: LanguageSwitcherOptions = {}) {
const { storageKey = 'pierre_app_language', onLanguageChange } = options;
const { i18n, language } = useTranslation();
// Load saved language on mount
useEffect(() => {
const loadLanguage = async () => {
try {
const savedLanguage = await AsyncStorage.getItem(storageKey);
if (savedLanguage && savedLanguage !== language) {
await i18n.changeLanguage(savedLanguage);
}
} catch (error) {
console.error('Failed to load saved language:', error);
}
};
loadLanguage();
}, [storageKey, i18n, language]);
// Change language and persist
const changeLanguage = useCallback(
async (newLanguage: SupportedLanguage) => {
try {
await i18n.changeLanguage(newLanguage);
await AsyncStorage.setItem(storageKey, newLanguage);
onLanguageChange?.(newLanguage);
} catch (error) {
console.error('Failed to save language:', error);
}
},
[i18n, storageKey, onLanguageChange]
);
return {
currentLanguage: language as SupportedLanguage,
changeLanguage,
};
}
