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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| /** | ||
| * @import {Locale} from 'expo-localization' | ||
| */ | ||
|
|
||
| jest.mock('expo-localization', () => { | ||
| return { | ||
| getLocales: () => [createBaseLocale('en-US')], | ||
| useLocales: () => { | ||
| return [createBaseLocale('en-US')]; | ||
| }, | ||
| }; | ||
|
|
||
| /** | ||
| * @param {string} languageTag | ||
| * @returns {Locale} | ||
| */ | ||
| function createBaseLocale(languageTag) { | ||
| return { | ||
| languageTag, | ||
| languageCode: null, | ||
| langageCurrencyCode: null, | ||
| langageCurrencySymbol: null, | ||
| languageRegionCode: null, | ||
| regionCode: null, | ||
| currencyCode: null, | ||
| currencySymbol: null, | ||
| decimalSeparator: null, | ||
| digitGroupingSeparator: null, | ||
| textDirection: null, | ||
| measurementSystem: null, | ||
| temperatureUnit: null, | ||
| }; | ||
| } | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| import {createContext, useContext} from 'react'; | ||
| import {createStore, useStore, type StoreApi} from 'zustand'; | ||
| import { | ||
| createJSONStorage, | ||
| persist as createPersistedState, | ||
| } from 'zustand/middleware'; | ||
|
|
||
| import {MMKVZustandStorage} from '../hooks/persistedState/createPersistedState'; | ||
|
|
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| export const STORAGE_KEY = 'MapeoLocale'; | ||
|
|
||
| export type SelectedLocaleState = { | ||
| /** | ||
| * Value consisting of a language tag (see https://en.wikipedia.org/wiki/IETF_language_tag) | ||
| * Represents the language that is explicitly chosen via a user action within the app. If null, it means that either: | ||
| * | ||
| * 1. The user has never chosen the language explicitly. | ||
| * 2. The user has unset the language (e.g. to defer to system preferences) | ||
| */ | ||
| languageTag: string | null; | ||
| }; | ||
|
|
||
| function createInitialState() { | ||
| return { | ||
| languageTag: null, | ||
| }; | ||
| } | ||
|
|
||
| export function createSelectedLocaleStore({persist} = {persist: false}) { | ||
| let store: StoreApi<SelectedLocaleState>; | ||
|
|
||
| if (persist) { | ||
| store = createStore( | ||
| createPersistedState(createInitialState, { | ||
| name: STORAGE_KEY, | ||
| storage: createJSONStorage(() => MMKVZustandStorage), | ||
| version: 1, | ||
| migrate: (persistedState, version) => { | ||
| /** | ||
| * Version 0 stores the state as `{ locale: string, setLocale: (locale: string) => void }`. | ||
| * We only need to handle the `locale` field, which is more specifically a language tag. | ||
| */ | ||
| if (version === 0) { | ||
| // Ensure that the persisted state for version has expected shape before attempting to migrate | ||
| if ( | ||
| typeof persistedState === 'object' && | ||
| persistedState !== null && | ||
| 'locale' in persistedState && | ||
| typeof persistedState.locale === 'string' | ||
| ) { | ||
| // TODO: log to Sentry to help understand how often this is happening? | ||
| return {languageTag: persistedState.locale}; | ||
| } | ||
| } | ||
|
|
||
| return {languageTag: null}; | ||
| }, | ||
| }), | ||
| ); | ||
| } else { | ||
| store = createStore(createInitialState); | ||
| } | ||
|
|
||
| const actions = { | ||
| setLanguageTag: (languageTag: string | null) => { | ||
| store.setState({languageTag}); | ||
| }, | ||
| }; | ||
|
|
||
| return {instance: store, actions}; | ||
| } | ||
|
|
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| export type SelectedLocaleStore = ReturnType<typeof createSelectedLocaleStore>; | ||
|
|
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| const SelectedLocaleContext = createContext<SelectedLocaleStore | null>(null); | ||
|
|
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| export const SelectedLocaleStoreProvider = SelectedLocaleContext.Provider; | ||
|
|
||
| function useSelectedLocaleContext() { | ||
| const value = useContext(SelectedLocaleContext); | ||
|
|
||
| if (!value) { | ||
| throw new Error('Must set up SelectedLocaleStoreProvider first'); | ||
| } | ||
|
|
||
| return value; | ||
| } | ||
|
|
||
| export function useSelectedLocaleState(): SelectedLocaleState; | ||
| export function useSelectedLocaleState<T>( | ||
| selector: (state: SelectedLocaleState) => T, | ||
| ): T; | ||
| export function useSelectedLocaleState<T>( | ||
| selector?: (state: SelectedLocaleState) => T, | ||
| ) { | ||
| const {instance} = useSelectedLocaleContext(); | ||
| return useStore(instance, selector!); | ||
| } | ||
|
|
||
| export function useSelectedLocaleActions() { | ||
| const {actions} = useSelectedLocaleContext(); | ||
| return actions; | ||
| } |
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