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17 lines
624 B
TypeScript
17 lines
624 B
TypeScript
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import {parse as languageParser} from "accept-language-parser";
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import {Request} from 'express';
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import {locales} from 'app/common/Locales';
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/**
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* Returns the locale from a request, falling back to `defaultLocale`
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* if unable to determine the locale.
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*/
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export function localeFromRequest(req: Request, defaultLocale: string = 'en-US') {
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const language = languageParser(req.headers["accept-language"] as string)[0];
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if (!language) { return defaultLocale; }
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const locale = `${language.code}-${language.region}`;
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const supports = locales.some(l => l.code === locale);
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return supports ? locale : defaultLocale;
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}
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