Rocket.Chat/client/contexts/TranslationContext.ts

import { createContext, useContext } from 'react';

export type TranslationLanguage = {
	name: string;
	en: string;
	key: string;
};

export type TranslationContextValue = {
	languages: TranslationLanguage[];
	language: TranslationLanguage['key'];
	loadLanguage: (language: TranslationLanguage['key']) => Promise<void>;
	translate: {
		(key: string, ...replaces: unknown[]): string;
		has: (key: string) => boolean;
	};
};

export const TranslationContext = createContext<TranslationContextValue>({
	languages: [{
		name: 'Default',
		en: 'Default',
		key: '',
	}],
	language: '',
	loadLanguage: async () => undefined,
	translate: Object.assign(
		(key: string) => key,
		{
			has: () => true,
		},
	),
});

export const useLanguages = (): TranslationContextValue['languages'] =>
	useContext(TranslationContext).languages;

export const useLanguage = (): TranslationContextValue['language'] =>
	useContext(TranslationContext).language;

export const useLoadLanguage = (): TranslationContextValue['loadLanguage'] =>
	useContext(TranslationContext).loadLanguage;

export const useTranslation = (): TranslationContextValue['translate'] =>
	useContext(TranslationContext).translate;