LAR_Maintenance/app/Jobs/ScheduleNextMaintenance.php

<?php

namespace App\Jobs;

use App\Models\Maintenance;
use App\Models\MaintenanceHistory;
use App\Models\MaintenanceTaskHistory;
use Cron\CronExpression;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Foundation\Queue\Queueable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;

class ScheduleNextMaintenance implements ShouldQueue
{
    use Queueable;

    /**
     * Create a new job instance.
     */
    public function __construct()
    {
        //
    }

    /**
     * Execute the job.
     */
    public function handle(): void
    {
        $maintenances = Maintenance::all();
        foreach ($maintenances as $maintenance) {
            $valid = CronExpression::isValidExpression($maintenance->schedule);
            if (!$valid) {
                dd($maintenance->schedule);
                return;
            }

            $cron = new CronExpression($maintenance->schedule);
            $maintenancePlanned = $maintenance->history()->create([
                'start_at' => $cron->getNextRunDate(null, 2)
            ]);
            $maintenancePlanned->refresh();

            $hosts = $maintenance->hosts;
            foreach ($hosts as $key => $host) {
                $maintenancePlannedHost = $maintenancePlanned->historyHosts()->create([
                    'host_id' => $host->id
                ]);

                $tasks = $maintenance->tasks;
                foreach ($tasks as $key => $task) {
                    $maintenancePlannedHost->historyTasks()->create([
                        'maintenance_task_id' => $task->id,
                        'maintenance_history_id' => $maintenancePlanned->id
                    ]);
                }
            }
        }
        die();
    }
}