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AppContext.tsx
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AppContext.tsx
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import * as i18n from '@solid-primitives/i18n';
import * as storage from '@solid-primitives/storage';
import { ResourceMetadata, getGuideDirectory } from '@solid.js/docs';
import * as router from '@solidjs/router';
import {
ParentComponent,
Suspense,
createContext,
createEffect,
createResource,
startTransition,
useContext,
} from 'solid-js';
import { createStore } from 'solid-js/store';
import { Meta, Title } from '@solidjs/meta';
// en dictionary is loaded by default
import { dict as en_dict } from '../lang/en/en';
type RawDictionary = typeof en_dict;
export type Locale =
| 'en'
| 'az'
| 'it'
| 'de'
| 'pt'
| 'ja'
| 'fr'
| 'id'
| 'he'
| 'ru'
| 'ar'
| 'fa'
| 'tr'
| 'tl'
| 'ko-kr'
| 'zh-cn'
| 'zh-tw'
| 'es'
| 'pl'
| 'uk';
/*
for validating of other dictionaries have same keys as en dictionary
some might be missing, but the shape should be the same
*/
type DeepPartial<T> = T extends Record<string, unknown>
? { [K in keyof T]?: DeepPartial<T[K]> }
: T;
const raw_dict_map: Record<Locale, () => Promise<{ dict: DeepPartial<RawDictionary> }>> = {
// eslint-disable-next-line @typescript-eslint/no-unsafe-return, @typescript-eslint/no-explicit-any
en: () => null as any, // en is loaded by default
az: () => import('../lang/az/az'),
it: () => import('../lang/it/it'),
de: () => import('../lang/de/de'),
pt: () => import('../lang/pt/pt'),
ja: () => import('../lang/ja/ja'),
fr: () => import('../lang/fr/fr'),
id: () => import('../lang/id/id'),
he: () => import('../lang/he/he'),
ru: () => import('../lang/ru/ru'),
ar: () => import('../lang/ar/ar'),
fa: () => import('../lang/fa/fa'),
tr: () => import('../lang/tr/tr'),
tl: () => import('../lang/tl/tl'),
'ko-kr': () => import('../lang/ko-kr/ko-kr'),
'zh-cn': () => import('../lang/zh-cn/zh-cn'),
'zh-tw': () => import('../lang/zh-tw/zh-tw'),
es: () => import('../lang/es/es'),
pl: () => import('../lang/pl/pl'),
uk: () => import('../lang/uk/uk'),
};
export type Dictionary = i18n.Flatten<RawDictionary>;
const en_flat_dict: Dictionary = i18n.flatten(en_dict);
async function fetchDictionary(locale: Locale): Promise<Dictionary> {
if (locale === 'en') return en_flat_dict;
const { dict } = await raw_dict_map[locale]();
const flat_dict = i18n.flatten(dict) as RawDictionary;
return { ...en_flat_dict, ...flat_dict };
}
// Some browsers does not map correctly to some locale code
// due to offering multiple locale code for similar language (e.g. tl and fil)
// This object maps it to correct `langs` key
const LANG_ALIASES: Partial<Record<string, Locale>> = {
fil: 'tl',
};
const toLocale = (string: string): Locale | undefined =>
string in raw_dict_map
? (string as Locale)
: string in LANG_ALIASES
? (LANG_ALIASES[string] as Locale)
: undefined;
interface Settings {
locale: Locale;
dark: boolean;
}
function initialLocale(location: router.Location): Locale {
let locale: Locale | undefined;
locale = toLocale(location.query.locale);
if (locale) return locale;
locale = toLocale(navigator.language.slice(0, 2));
if (locale) return locale;
locale = toLocale(navigator.language.toLocaleLowerCase());
if (locale) return locale;
return 'en';
}
function initialSettings(location: router.Location): Settings {
return {
locale: initialLocale(location),
dark: window.matchMedia('(prefers-color-scheme: dark)').matches,
};
}
function deserializeSettings(value: string, location: router.Location): Settings {
const parsed = JSON.parse(value) as unknown;
if (!parsed || typeof parsed !== 'object') return initialSettings(location);
return {
locale:
('locale' in parsed && typeof parsed.locale === 'string' && toLocale(parsed.locale)) ||
initialLocale(location),
dark: 'dark' in parsed && typeof parsed.dark === 'boolean' ? parsed.dark : false,
};
}
interface AppState {
get isDark(): boolean;
setDark(value: boolean): void;
get locale(): Locale;
setLocale(value: Locale): void;
t: i18n.Translator<Dictionary>;
get dir(): 'ltr' | 'rtl';
get guides(): ResourceMetadata[] | undefined;
}
const AppContext = createContext<AppState>({} as AppState);
export const useAppState = () => useContext(AppContext);
export const AppContextProvider: ParentComponent = (props) => {
const location = router.useLocation();
const now = new Date();
const cookieOptions: storage.CookieOptions = {
expires: new Date(now.getFullYear() + 1, now.getMonth(), now.getDate()),
};
const [settings, set] = storage.makePersisted(createStore(initialSettings(location)), {
storageOptions: cookieOptions,
storage: storage.cookieStorage,
deserialize: (value) => deserializeSettings(value, location),
});
const locale = () => settings.locale;
const [dict] = createResource(locale, fetchDictionary, { initialValue: en_flat_dict });
const [guidesList] = createResource(locale, getGuideDirectory);
createEffect(() => {
document.documentElement.lang = settings.locale;
});
createEffect(() => {
if (settings.dark) document.documentElement.classList.add('dark');
else document.documentElement.classList.remove('dark');
});
const t = i18n.translator(dict, i18n.resolveTemplate);
const state: AppState = {
get isDark() {
return settings.dark;
},
setDark(value) {
set('dark', value);
},
get locale() {
return settings.locale;
},
setLocale(value) {
void startTransition(() => {
set('locale', value);
});
},
t,
get dir() {
return t('global.dir') === 'ltr' ? 'ltr' : 'rtl';
},
get guides() {
return guidesList();
},
};
return (
<Suspense>
<AppContext.Provider value={state}>
<Title>{t('global.title')}</Title>
<Meta name="lang" content={locale()} />
<div dir={state.dir}>{props.children}</div>
</AppContext.Provider>
</Suspense>
);
};