ldc-legaulois/app/Http/Middleware/Authenticate.php

<?php

namespace App\Http\Middleware;

use Illuminate\Auth\Middleware\Authenticate as Middleware;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Session;

class Authenticate extends Middleware
{
    /**
     * Get the path the user should be redirected to when they are not authenticated.
     *
     * @param  \Illuminate\Http\Request $request
     * @return string|null
     */
    protected function redirectTo($request)
    {
        // Client qui essaye d'accéder au BO
        if ($request->is('bo', 'bo/*')) {
            if (Auth::guard('customer')->check()) {
                abort(404);
            }
            return route('login');
        }

        // Admin qui va sur la page de connexion client
        if ($request->is('form-connexion')) {
            if (Auth::check()) {
                return redirect()->route('home');
            }
        }

        if (! $request->expectsJson()) {
            if ($request->is('bo', 'bo/*')) {
                if (!Auth::check()) {
                    Session::put('url.intended', url()->current());
                    Session::save();
                    return route('form-connexion');
                }
            } else {
                if (!Auth::guard('customer')->check()) {
                    Session::put('url.intended', url()->current());
                    Session::save();
                    return route('form-connexion');
                }
            }
        }
    }
}