add controllers, servoices

app/Services/ClassPreparation/ClassPreparationAdjustmentService.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Services\ClassPreparation;
+
+use App\Models\ClassPrepAdjustment;
+
+class ClassPreparationAdjustmentService
+{
+    public function applyAdjustments(array $baseItems, string $classSectionId, string $schoolYear): array
+    {
+        $rawAdjustments = ClassPrepAdjustment::query()
+            ->where('class_section_id', $classSectionId)
+            ->where('school_year', $schoolYear)
+            ->where('adjustable', 1)
+            ->get()
+            ->toArray();
+
+        $adjMap = ['Large Table' => 0, 'Small Table' => 0];
+        foreach ($rawAdjustments as $adjustment) {
+            $item = $adjustment['item_name'] ?? '';
+            $delta = (int) ($adjustment['adjustment'] ?? 0);
+            if (array_key_exists($item, $adjMap)) {
+                $adjMap[$item] = $delta;
+            }
+            if (isset($baseItems[$item])) {
+                $baseItems[$item] = max(0, (int) $baseItems[$item] + $delta);
+            }
+        }
+
+        return [$baseItems, $adjMap];
+    }
+}