CourseWork/app/Providers/ModelServiceProvider.php

<?php

namespace App\Providers;

use App\Http\Controllers\GradeController;
use App\Http\Controllers\GradeSubjectController;
use App\Http\Controllers\StudentController;
use App\Http\Controllers\SubjectController;
use App\Http\Controllers\SubjectTeacherController;
use App\Http\Controllers\TeacherController;
use App\Services\GradeService;
use App\Services\GradeSubjectService;
use App\Services\ServiceInterface;
use App\Services\StudentService;
use App\Services\SubjectService;
use App\Services\SubjectTeacherService;
use App\Services\TeacherService;
use Illuminate\Support\ServiceProvider;

class ModelServiceProvider extends ServiceProvider
{
    /**
     * Register services.
     */
    public function register(): void
    {
        $this->app->when(StudentController::class)
            ->needs(ServiceInterface::class)
            ->give(function () {
                return new StudentService();
            });

        $this->app->when(TeacherController::class)
            ->needs(ServiceInterface::class)
            ->give(function () {
                return new TeacherService();
            });

        $this->app->when(GradeController::class)
            ->needs(ServiceInterface::class)
            ->give(function () {
                return new GradeService();
            });

        $this->app->when(SubjectController::class)
            ->needs(ServiceInterface::class)
            ->give(function () {
                return new SubjectService();
            });

        $this->app->when(SubjectTeacherController::class)
            ->needs(ServiceInterface::class)
            ->give(function () {
                return new SubjectTeacherService();
            });

        $this->app->when(GradeSubjectController::class)
            ->needs(ServiceInterface::class)
            ->give(function () {
                return new GradeSubjectService();
            });
    }

    /**
     * Bootstrap services.
     */
    public function boot(): void
    {
        //
    }
}