reconstruction of the project

app/Models/SchoolClass.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\BaseModel;
+
+class SchoolClass extends BaseModel
+{
+    protected $table = 'classes';
+
+    // CI: useTimestamps = false
+    public $timestamps = false;
+
+    protected $fillable = [
+        'class_name',
+        'schedule',
+        'capacity',
+        'semester',
+        'school_year',
+    ];
+
+    protected $casts = [
+        'capacity' => 'integer',
+    ];
+
+    /* =========================
+     * CI method equivalents
+     * ========================= */
+
+    public static function getAllClasses()
+    {
+        return static::query()->get();
+    }
+
+    public static function getClassById(int $id): ?self
+    {
+        return static::query()->find($id);
+    }
+
+    public static function createClass(array $data): int
+    {
+        $row = static::create($data);
+        return (int) $row->id;
+    }
+
+    public static function updateClass(int $id, array $data): bool
+    {
+        return static::query()->whereKey($id)->update($data) >= 0;
+    }
+
+    public static function deleteClass(int $id): bool
+    {
+        $row = static::query()->find($id);
+        if (!$row) return false;
+        return (bool) $row->delete();
+    }
+}