first change

Modules/CourseFinder/app/Services/ProgramLevelService.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace Modules\CourseFinder\Services;
+
+use Illuminate\Support\Facades\DB;
+use Modules\CourseFinder\Models\ProgramLevel;
+
+class ProgramLevelService
+{
+
+    public function getAllCategories()
+    {
+        $query = ProgramLevel::query();
+        return $query->get();
+    }
+
+    public function storeProgramLevel(array $programLevelData): ProgramLevel
+    {
+        return DB::transaction(function () use ($programLevelData) {
+            $programLevel = ProgramLevel::create($programLevelData);
+
+            return $programLevel;
+        });
+    }
+
+    public function getProgramLevelById(int $id)
+    {
+        return ProgramLevel::findOrFail($id);
+    }
+
+    public function updateProgramLevel(int $id, array $programLevelData)
+    {
+        $programLevel = $this->getProgramLevelById($id);
+
+        return DB::transaction(function () use ($programLevel, $programLevelData) {
+            $programLevel->update($programLevelData);
+            return $programLevel;
+        });
+    }
+
+    public function deleteProgramLevel(int $id)
+    {
+        return DB::transaction(function () use ($id) {
+            $programLevel = $this->getProgramLevelById($id);
+            $programLevel->delete();
+            return true;
+        });
+    }
+}