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templateAppDir.ts
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templateAppDir.ts
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import { ParsedFilePkg } from './types'
import {
interceptExport,
addLoadLocalesFrom,
clientLine,
INTERNAL_CONFIG_KEY,
} from './utils'
const validPages = [
'/page',
'/layout',
'/error',
'/loading',
'/not-found',
'/global-error',
]
const validPagesRegex = new RegExp(`(${validPages.join('|')})$`)
export default function templateAppDir(
pagePkg: ParsedFilePkg,
{
code = '',
pageNoExt = '/',
normalizedResourcePath = '',
appFolder = '',
isClientComponent = false,
existLocalesFolder = true,
} = {}
) {
const routeType =
validPages.find((pageName) => pageNoExt.endsWith(pageName)) || 'component'
const isPage =
routeType !== 'component' && normalizedResourcePath.includes(appFolder)
// Ignore files that are not RSC or RCC valid pages
if (!isPage) return code
const hash = Date.now().toString(16)
const pathname = pageNoExt.replace(validPagesRegex, '/')
// Removes the export default from the page
// and tells under what name we can get the old export
const pageVariableName = interceptExport(
pagePkg,
'default',
`__Next_Translate__Page__${hash}__`
)
// Client/Server pages without default export should not be transpiled
if (isPage && !pageVariableName) return code
// Client pages (RCC)
if (isClientComponent) {
return templateRCCPage({
pagePkg,
hash,
pageVariableName,
pathname,
routeType,
existLocalesFolder,
})
}
// Server pages (RSC)
return templateRSCPage({
pagePkg,
hash,
pageVariableName,
pathname,
routeType,
existLocalesFolder,
})
}
type Params = {
pagePkg: ParsedFilePkg
hash: string
pageVariableName: string
pathname?: string
routeType: string
existLocalesFolder: boolean
}
function templateRSCPage({
pagePkg,
hash,
pageVariableName,
pathname,
routeType,
existLocalesFolder,
}: Params) {
const code = pagePkg.getCode()
return `
import ${INTERNAL_CONFIG_KEY} from '@next-translate-root/i18n'
import AppDirI18nProvider from 'next-translate/AppDirI18nProvider'
import __loadNamespaces from 'next-translate/loadNamespaces'
${code}
export default async function __Next_Translate_new__${hash}__(props) {
const detectedLang = props.params?.lang ?? props.searchParams?.lang
if (detectedLang === 'favicon.ico') return <${pageVariableName} {...props} />
${routeType !== '/page'
// Related with https://github.com/aralroca/next-translate/issues/1090
// Early return to avoid conflicts with /layout or /loading that don't have detectedLang
? `if (globalThis.__NEXT_TRANSLATE__ && !detectedLang) return <${pageVariableName} {...props} />`
: ''
}
const config = {
...${INTERNAL_CONFIG_KEY},
locale: detectedLang ?? ${INTERNAL_CONFIG_KEY}.defaultLocale,
loaderName: 'server ${routeType}',
pathname: '${pathname}'
}
const { __lang, __namespaces } = await __loadNamespaces({ ...config, ${addLoadLocalesFrom(
existLocalesFolder
)} });
const oldNamespaces = globalThis.__NEXT_TRANSLATE__?.namespaces ?? {}
const namespaces = { ...oldNamespaces, ...__namespaces }
globalThis.__NEXT_TRANSLATE__ = { lang: __lang, namespaces, config }
return <AppDirI18nProvider lang={__lang} namespaces={namespaces} config={JSON.parse(JSON.stringify(config))}><${pageVariableName} {...props} /></AppDirI18nProvider>
}
`
}
function templateRCCPage({
pagePkg,
hash,
pageVariableName,
pathname,
routeType,
existLocalesFolder,
}: Params) {
const topLine = clientLine[0]
let clientCode = pagePkg.getCode()
// Clear current "use client" top line
clientLine.forEach((line) => {
clientCode = clientCode.replace(line, '')
})
return `${topLine}
import ${INTERNAL_CONFIG_KEY} from '@next-translate-root/i18n'
import AppDirI18nProvider from 'next-translate/AppDirI18nProvider'
import { useSearchParams as __useSearchParams, useParams as __useParams } from 'next/navigation'
import { use as __use, Suspense as __Suspense } from 'react'
import __loadNamespaces from 'next-translate/loadNamespaces'
${clientCode}
export default function __Next_Translate_new__${hash}__(props) {
const searchParams = __useSearchParams()
const params = __useParams()
const detectedLang = params.lang ?? searchParams.get('lang')
if (detectedLang === 'favicon.ico') return <${pageVariableName} {...props} />
${routeType !== '/page'
// Related with https://github.com/aralroca/next-translate/issues/1090
// Early return to avoid conflicts with /layout or /loading that don't have detectedLang
? `if (globalThis.__NEXT_TRANSLATE__ && !detectedLang) return <${pageVariableName} {...props} />`
: ''
}
const lang = detectedLang ?? ${INTERNAL_CONFIG_KEY}.defaultLocale
const config = {
...${INTERNAL_CONFIG_KEY},
locale: lang,
loaderName: 'client ${routeType}',
pathname: '${pathname}',
}
return (
<__Suspense fallback={null}>
<__Next_Translate__child__${hash}__
{...props}
config={config}
promise={__loadNamespaces({ ...config, ${addLoadLocalesFrom(existLocalesFolder)} })}
/>
</__Suspense>
)
}
function __Next_Translate__child__${hash}__({ promise, config, ...props }) {
const { __lang, __namespaces } = __use(promise);
const oldNamespaces = globalThis.__NEXT_TRANSLATE__?.namespaces ?? {};
globalThis.__NEXT_TRANSLATE__ = { lang: __lang, namespaces: { ...oldNamespaces, ...__namespaces }, config };
return <${pageVariableName} {...props} />;
}
`
}