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docs/components/page-header/LanguagePicker.tsx
Peter Bengtsson 9d4b913bdc language redirects without cache (#25872)
* redirect to your preferred language (#25664)

* redirect to your preferred language

* refactorings

* use js-cookies

* make sure no cache when language is involved in the redirect

* fix tests
2022-03-07 16:25:22 +00:00

78 lines
2.4 KiB
TypeScript

import { useRouter } from 'next/router'
import Cookies from 'js-cookie'
import { Link } from 'components/Link'
import { useLanguages } from 'components/context/LanguagesContext'
import { Picker } from 'components/ui/Picker'
import { useTranslation } from 'components/hooks/useTranslation'
// This value is replicated in two places! See middleware/detect-language.js
const PREFERRED_LOCALE_COOKIE_NAME = 'preferredlang'
type Props = {
variant?: 'inline'
}
export const LanguagePicker = ({ variant }: Props) => {
const router = useRouter()
const { languages } = useLanguages()
const locale = router.locale || 'en'
const langs = Object.values(languages)
const selectedLang = languages[locale]
const { t } = useTranslation('picker')
// The `router.asPath` will always be without a hash in SSR
// So to avoid a hydraration failure on the client, we have to
// normalize it to be without the hash. That way the path is treated
// in a "denormalized" way.
const routerPath = router.asPath.split('#')[0]
function rememberPreferredLanguage(code: string) {
try {
Cookies.set(PREFERRED_LOCALE_COOKIE_NAME, code, {
expires: 365,
secure: document.location.protocol !== 'http:',
})
} catch (err) {
// You can never be too careful because setting a cookie
// can fail. For example, some browser
// extensions disallow all setting of cookies and attempts
// at the `document.cookie` setter could throw. Just swallow
// and move on.
console.warn('Unable to set preferred language cookie', err)
}
}
return (
<Picker
variant={variant}
data-testid="language-picker"
defaultText={t('language_picker_default_text')}
options={langs
.filter((lang) => !lang.wip)
.map((lang) => ({
text: lang.nativeName || lang.name,
selected: lang === selectedLang,
item: (
<Link
href={routerPath}
locale={lang.code}
onClick={() => {
rememberPreferredLanguage(lang.code)
}}
>
{lang.nativeName ? (
<>
<span lang={lang.code}>{lang.nativeName}</span> (
<span lang="en">{lang.name}</span>)
</>
) : (
<span lang={lang.code}>{lang.name}</span>
)}
</Link>
),
}))}
/>
)
}