Defining and Dispatching a Job for sending mass email notifications during a promotional sale

PromotionalSaleController.php

<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use App\Jobs\SendPromotionalSaleEmailJob;
use App\Models\User;
use Illuminate\Http\Request;


class PromotionalSaleController extends Controller
{

  public function sendMassEmails(Request $request)
  {
      SendPromotionalSaleEmailJob::dispatch($request->content);

      return redirect()->back()->with('message', 'Emails dispatching started successfully!');
  }
}

SendPromotionalSaleEmailJob.php

<?php

namespace App\Jobs;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use App\Models\User;

class SendPromotionalSaleEmailJob implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    public function __construct(protected string $content)
    {
    }

    public function handle()
    {
        // Paginate the users or chunk them to process in batches
        User::select(['id', 'email'])->chunk(1000, function ($users) {
            foreach ($users as $user) {
                // Send email to each user
                \Mail::to($user->email)->send(new \App\Mail\PromotionalOffer($this->content));
            }
        });
    }
}