staffmanager/app/Services/VacancyApplicationService.php

<?php

/*
 * Copyright © 2020 Miguel Nogueira
 *
 *   This file is part of Raspberry Staff Manager.
 *
 *     Raspberry Staff Manager is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     Raspberry Staff Manager is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with Raspberry Staff Manager.  If not, see <https://www.gnu.org/licenses/>.
 */

namespace App\Services;

use App\Application;
use App\Vacancy;

class VacancyApplicationService
{
    /**
     * Finds all applications associated with $model.
     *
     * @param Vacancy $model The model you want to search through.
     * @return Illuminate\Support\Collection A collection of applications
     */
    public function findApplications(Vacancy $model)
    {
        $applications = collect([]);

        foreach (Application::all() as $application) {
            if ($application->response->vacancy->id == $model->id) {
                $applications->push($application);
            }
        }

        return $applications;
    }
}