28 lines
871 B
TypeScript
28 lines
871 B
TypeScript
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import acceptLanguage from "accept-language";
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import type { Handler } from "hono";
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import { appConstants } from "../constants";
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acceptLanguage.languages(appConstants.supportedLanguages);
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export const langRewriteHandler: Handler = async (c, next) => {
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const { origin, pathname } = new URL(c.req.url);
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if (alreadyHasLanguageCode(pathname)) {
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c.set("REWRITE", c.req.url);
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} else {
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const language = acceptLanguage.get(c.req.headers.get("accept-language"));
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const newUrl = `${origin}/${language}${pathname}`;
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c.set("REWRITE", newUrl);
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}
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await next();
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};
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const alreadyHasLanguageCode = (pathname: string): boolean => {
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return appConstants.supportedLanguages.some((lang) => {
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const prefix = `/${lang}`;
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if (pathname.length === prefix.length) {
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return pathname === prefix;
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}
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return pathname.startsWith(`${prefix}/`);
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});
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};
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