how to solve: seting locale translation from laravel middleware not working - php

Question

I am configuring a multilanguage app. The user is visiting the app as a guest (I wonder if this is related).
My default language in config/app.php is pt-BR. I created a database table called languages, where I save the languages available for the app.
Languages model
Schema::create('languages', function (Blueprint $table) {
$table->id();
$table->string('iso2');
$table->string('name');
$table->string('native');
$table->timestamps();
});
I have a dropdown in the navigation bar where the user can select the language. Then, when the page loads, I get the locale from the session to display as the desired locale/language.
<x-dropdown align="right" width="48">
<x-slot name="trigger">
<button >
<div class="flex">
<x-flag :name="app()->getLocale()" />
</div>
<div class="ml-1">
svg for down array
</div>
</button>
</x-slot>
<x-slot name="content">
#foreach ($languages as $lang)
<x-dropdown-link :href="route('language', $lang->iso2)" >
<x-flag :name="$lang->iso2" />
<span class="ml-2">{{ $lang->native }}</span>
</x-dropdown-link>
#endforeach
</x-slot>
</x-dropdown>
Web route for setting the language:
Route::get('lang/{language:iso2}', [LocalizationController::class, 'index'])->name('language');
When the user select the language, a request is sent to this controller.
LocalizationController.php
public function index(Language $language)
{
session()->put('locale', $language->iso2);
return redirect()->back();
}
And I defined this middleware: App\Http\Middleware\Localization:
<?php
namespace App\Http\Middleware;
use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\App;
class Localization
{
/**
* Handle an incoming request.
*
* #param \Illuminate\Http\Request $request
* #param \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse) $next
* #return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse
*/
public function handle(Request $request, Closure $next)
{
if (session()->has('locale')) {
Carbon::setLocale(session()->get('locale'));
App::setLocale(session()->get('locale'));
}
return $next($request);
}
}
I also registered the middleware in kernel.php:
protected $middleware = [
\App\Http\Middleware\Localization::class,
...
];
But when I select a locale other than pt-BR, nothing happens. The locale from the session changes, but when I dd on middleware like:
dump("Locale session value in localization middleware: ",session()->get('locale') );
The locale is null, but if I print session()->get('locale') in the view, the locale is the one that I selected in the dropdown, but the app locale is still pt-br. I don't understand why this is happening. Does anyone have a clue?

Answer 1

You come up with some crutches!
Why are you doing some kind of reverse redirect to the same page when choosing a language on the site? In your dropdownlist for each language, a link to the page on which you are located should be generated, taking into account the locale! No redirects!
Why are you saving languages to a database? On Your website will use a thousand languages? Or will there be a new language version of the site every day? Why else load the application with unnecessary queries to the database to get a list of languages? If you need to store lang in the database, then these should be translations!
For localization in config/app You must have one default locale in the locale cell.
Next, you can add an additional cell to this configuration file, for example, locales, where you can set all the languages ​​that you want to use on the site, for example, like this:
// ....
'locales' => ['ru', 'en'],
// ....
Create a simple service. Register it in cell providers in config/app:
php artisan make:provider App\Services\Localization\LocalizationServiceProvider
In the service write the following code:
<?php
namespace App\Services\Localization;
use Illuminate\Support\ServiceProvider;
/**
* Class LocalizationServiceProvider
*
* #package App\Services\Localization
*/
class LocalizationServiceProvider extends ServiceProvider
{
/**
* Register services.
*
* #return void
*/
public function register()
{
$this->app->singleton('Localization', function () {
return new Localization;
});
}
/**
* Bootstrap services.
*
* #return void
*/
public function boot()
{
//
}
}
For convenience, we create a facade for the created service provider:
<?php
namespace App\Services\Localization;
use Illuminate\Support\Facades\Facade;
/**
* Class LocalizationService
*
* #package App\Services\Localization
*/
class LocalizationService extends Facade
{
/**
* #return string
*/
public static function getFacadeAccessor(): string
{
return 'Localization';
}
}
And add a additional class Localization, where we create one simple method:
<?php
namespace App\Services\Localization;
/**
* Class Localization
*
* #package App\Services\Localization
*/
class Localization
{
/**
* #return string
*/
public function locale(): string
{
$locale = request()->segment(1);
if($locale && \in_array($locale, config('app.locales'))) {
\App::setLocale($locale);
return $locale;
}
return '';
}
}
Then for the routes you set a group something like this:
Route::group(['prefix' => LocalizationService::locale()], 'middleware' => [/*...*/]], function () {
// YOUR routes here ....
});
Checked on Laravel v9.48. Working 100%!