import type { HttpContext } from '@adonisjs/core/http';
import type { NextFn } from '@adonisjs/core/types/http';
import { getConfiguration } from '@intlayer/config';
import {
getDictionary as getDictionaryFunction,
getIntlayer as getIntlayerFunction,
localeDetector,
} from '@intlayer/core';
import { appNamespace, getStorageLocale, translateFunction } from './index';
const configuration = getConfiguration();
const { internationalization } = configuration;
/**
* AdonisJS middleware that detects the user's locale and populates the context with Intlayer data.
*/
export default class IntlayerMiddleware {
async handle(ctx: HttpContext, next: NextFn) {
// Detect if locale is set by intlayer frontend lib in the headers or cookies
const localeFromStorage = getStorageLocale(ctx);
const negotiatorHeaders: Record<string, string> = {};
// Copy all headers from the request to negotiatorHeaders
const headers = ctx.request.headers();
for (const key in headers) {
const val = headers[key];
if (typeof val === 'string') {
negotiatorHeaders[key] = val;
} else if (Array.isArray(val)) {
negotiatorHeaders[key] = val.join(',');
}
}
const localeDetected = localeDetector(
negotiatorHeaders,
internationalization.locales,
internationalization.defaultLocale
);
const locale = localeFromStorage ?? localeDetected;
// Decorate context
(ctx as any).locale = locale;
(ctx as any).defaultLocale = internationalization.defaultLocale;
const t = translateFunction(ctx);
const getIntlayer: typeof getIntlayerFunction = (
key,
localeArg = locale as Parameters<typeof getIntlayerFunction>[1],
...props
) => getIntlayerFunction(key, localeArg, ...props);
const getDictionary: typeof getDictionaryFunction = (
key,
localeArg = locale as Parameters<typeof getDictionaryFunction>[1],
...props
) => getDictionaryFunction(key, localeArg, ...props);
// Make functions available via CLS
await appNamespace.runPromise(async () => {
appNamespace.set('locale', locale);
appNamespace.set('t', t);
appNamespace.set('getIntlayer', getIntlayer);
appNamespace.set('getDictionary', getDictionary);
await next();
});
}
}
