Executing extra logic when changing locale

You can create a middleware that will execute the extra logic when changing the locale. Here's an example:

1. Create a new middleware using the following command:

php artisan make:middleware StoreLocale

1. Open the app/Http/Middleware/StoreLocale.php file and add the following code:

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Session;
use Mcamara\LaravelLocalization\Middleware\LocaleSessionRedirect;

class StoreLocale extends LocaleSessionRedirect
{
    public function handle($request, Closure $next)
    {
        $response = parent::handle($request, $next);

        if (Auth::check()) {
            // Store the chosen locale in the database
            Auth::user()->update(['locale' => app()->getLocale()]);
        } else {
            // Store the chosen locale in the session
            Session::put('locale', app()->getLocale());
        }

        return $response;
    }
}

1. Register the middleware in the app/Http/Kernel.php file:

protected $middlewareGroups = [
    'web' => [
        // ...
        \App\Http\Middleware\StoreLocale::class,
    ],

    // ...
];

Now, every time the locale is changed, the middleware will store the chosen locale in the database if the user is logged in, or in the session if not.