alrahma_sunday_school_api/app/Http/Controllers/Api/ClassController.php

<?php

namespace App\Http\Controllers\Api;

use App\Models\ClassModel;
use App\Models\StudentClass;
use Symfony\Component\HttpFoundation\Response;

class ClassController extends BaseApiController
{
    protected Class $class;
    protected StudentClass $studentClass;

    public function __construct()
    {
        parent::__construct();
        $this->class        = model(ClassModel::class);
        $this->studentClass = model(StudentClass::class);
    }

    public function index()
    {
        $page     = max(1, (int) ($this->request->getGet('page') ?? 1));
        $perPage  = min(100, max(1, (int) ($this->request->getGet('per_page') ?? 20)));
        $grade    = $this->request->getGet('grade');
        $teacher  = $this->request->getGet('teacher_id');

        $query = $this->class->newQuery();
        if ($grade) {
            $query->where('grade', $grade);
        }
        if ($teacher) {
            $query->where('teacher_id', $teacher);
        }

        $query->orderBy('grade', 'ASC');

        $result = $this->paginate($query, $page, $perPage);
        return $this->success($result, 'Classes retrieved successfully');
    }

    public function show($id = null)
    {
        $class = $this->class->find($id);
        if (!$class) {
            return $this->respondError('Class not found', Response::HTTP_NOT_FOUND);
        }
        return $this->success($class, 'Class details retrieved successfully');
    }

    public function students($id = null)
    {
        $students = $this->studentClass->newQuery()
            ->select('students.id', 'students.firstname', 'students.lastname', 'students.school_id')
            ->join('students', 'students.id', '=', 'student_class.student_id')
            ->where('student_class.class_id', $id)
            ->orderBy('students.lastname', 'ASC')
            ->get()
            ->toArray();

        return $this->success($students, 'Students retrieved successfully for class');
    }
}