Refactoring Controller

CustomerController.php

<?php

namespace App\Http\Controllers;

use App\Http\Requests\CustomerStoreRequest;
use App\Services\CustomerService;

class CustomerController extends Controller
{

    protected $customerService;

    public function __construct(CustomerService $customerService)
    {
        $this->customerService = $customerService;
    }

    public function store(CustomerStoreRequest $request)
    {

        $this->customerService->store($request->validated());

        return [
            'saved' => true,
        ];
    }
}

CustomerService.php

<?php

namespace App\Services;

use DB;
use Mail;
use App\Mail\WelcomeNewCustomer;


class CustomerService
{
    public function store($data)
    {
        DB::table('customers')->insert($data);

        $this->sendWelcomeEmail($data);
    }

    private function sendWelcomeEmail($data)
    {
        Mail::to($data->email)->send(new WelcomeNewCustomer($data));
    }
}

CustomerStoreRequest.php

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class CustomerStoreRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'name' => 'required',
            'email' => 'required',
        ];
    }
}