feat: add language switcher (#1337)

## Description

Web changes:

- Enabled i18n for web
- Add option to change language in command menu
- Add option to change language in menu-switcher

Web and marketing changes:

- Stop setting 'en' preference into cookie if the user's language is not
supported
- Dropped middleware changes
- Rotated cookie from 'i18n' to 'language'

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Introduced a language switcher in the footer for improved language
selection.
	- Added dynamic language change functionality in the command menu.
- Implemented a dropdown menu item for quick access to the language
switcher.

- **Bug Fixes**
- Resolved issues related to language change notifications and state
management.

- **Translations**
- Added new translation entries for improved language support, including
"Search languages..." in English and German.
	- Updated existing translations to enhance clarity and accuracy.

- **Chores**
	- Simplified internationalization handling in middleware.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: github-actions <github-actions@documenso.com>

apps/marketing/src/components/(marketing)/footer.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import type { HTMLAttributes } from 'react';
+import { type HTMLAttributes, useState } from 'react';
 
 import Image from 'next/image';
 import Link from 'next/link';
@@ -9,15 +9,15 @@ import { msg } from '@lingui/macro';
 import { useLingui } from '@lingui/react';
 import { FaXTwitter } from 'react-icons/fa6';
 import { LiaDiscord } from 'react-icons/lia';
-import { LuGithub } from 'react-icons/lu';
+import { LuGithub, LuLanguages } from 'react-icons/lu';
 
 import LogoImage from '@documenso/assets/logo.png';
-import { cn } from '@documenso/ui/lib/utils';
-import { ThemeSwitcher } from '@documenso/ui/primitives/theme-switcher';
-
-import { I18nSwitcher } from '~/components/(marketing)/i18n-switcher';
-
+import { SUPPORTED_LANGUAGES } from '@documenso/lib/constants/i18n';
 // import { StatusWidgetContainer } from './status-widget-container';
+import { LanguageSwitcherDialog } from '@documenso/ui/components/common/language-switcher-dialog';
+import { cn } from '@documenso/ui/lib/utils';
+import { Button } from '@documenso/ui/primitives/button';
+import { ThemeSwitcher } from '@documenso/ui/primitives/theme-switcher';
 
 export type FooterProps = HTMLAttributes<HTMLDivElement>;
 
@@ -44,7 +44,9 @@ const FOOTER_LINKS = [
 ];
 
 export const Footer = ({ className, ...props }: FooterProps) => {
-  const { _ } = useLingui();
+  const { _, i18n } = useLingui();
+
+  const [languageSwitcherOpen, setLanguageSwitcherOpen] = useState(false);
 
   return (
     <div className={cn('border-t py-12', className)} {...props}>
@@ -97,13 +99,22 @@ export const Footer = ({ className, ...props }: FooterProps) => {
         </p>
 
         <div className="flex flex-row-reverse items-center sm:flex-row">
-          <I18nSwitcher className="text-muted-foreground ml-2 rounded-full font-normal sm:mr-2" />
+          <Button
+            className="text-muted-foreground ml-2 rounded-full font-normal sm:mr-2"
+            variant="ghost"
+            onClick={() => setLanguageSwitcherOpen(true)}
+          >
+            <LuLanguages className="mr-1.5 h-4 w-4" />
+            {SUPPORTED_LANGUAGES[i18n.locale]?.full || i18n.locale}
+          </Button>
 
           <div className="flex flex-wrap">
             <ThemeSwitcher />
           </div>
         </div>
       </div>
+
+      <LanguageSwitcherDialog open={languageSwitcherOpen} setOpen={setLanguageSwitcherOpen} />
     </div>
   );
 };

apps/marketing/src/components/(marketing)/i18n-switcher.tsx

@@ -1,71 +0,0 @@
-import { useState } from 'react';
-
-import { msg } from '@lingui/macro';
-import { useLingui } from '@lingui/react';
-import { CheckIcon } from 'lucide-react';
-import { LuLanguages } from 'react-icons/lu';
-
-import { SUPPORTED_LANGUAGES } from '@documenso/lib/constants/i18n';
-import { switchI18NLanguage } from '@documenso/lib/server-only/i18n/switch-i18n-language';
-import { dynamicActivate } from '@documenso/lib/utils/i18n';
-import { cn } from '@documenso/ui/lib/utils';
-import { Button } from '@documenso/ui/primitives/button';
-import {
-  CommandDialog,
-  CommandGroup,
-  CommandInput,
-  CommandItem,
-  CommandList,
-} from '@documenso/ui/primitives/command';
-
-type I18nSwitcherProps = {
-  className?: string;
-};
-
-export const I18nSwitcher = ({ className }: I18nSwitcherProps) => {
-  const { i18n, _ } = useLingui();
-
-  const [open, setOpen] = useState(false);
-  const [value, setValue] = useState(i18n.locale);
-
-  const setLanguage = async (lang: string) => {
-    setValue(lang);
-    setOpen(false);
-
-    await dynamicActivate(i18n, lang);
-    await switchI18NLanguage(lang);
-  };
-
-  return (
-    <>
-      <Button className={className} variant="ghost" onClick={() => setOpen(true)}>
-        <LuLanguages className="mr-1.5 h-4 w-4" />
-        {SUPPORTED_LANGUAGES[value]?.full || i18n.locale}
-      </Button>
-
-      <CommandDialog open={open} onOpenChange={setOpen}>
-        <CommandInput placeholder={_(msg`Search languages...`)} />
-
-        <CommandList>
-          <CommandGroup>
-            {Object.values(SUPPORTED_LANGUAGES).map((language) => (
-              <CommandItem
-                key={language.short}
-                value={language.full}
-                onSelect={async () => setLanguage(language.short)}
-              >
-                <CheckIcon
-                  className={cn(
-                    'mr-2 h-4 w-4',
-                    value === language.short ? 'opacity-100' : 'opacity-0',
-                  )}
-                />
-                {SUPPORTED_LANGUAGES[language.short].full}
-              </CommandItem>
-            ))}
-          </CommandGroup>
-        </CommandList>
-      </CommandDialog>
-    </>
-  );
-};