migrate to gtea from bistbucket

public/restaurant/app/Helper/PurchaseHelper.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Helper;
+
+use Carbon\Carbon;
+use Modules\Restaurant\Models\Purchase;
+
+class PurchaseHelper
+{
+    /**
+     * Generate a unique purchase invoice number for a restaurant.
+     *
+     * Format: PUR-{YYYYMMDD}-{RestaurantId}-{AutoIncrement}
+     */
+    public static function generateInvoiceNumber(int $restaurantId): string
+    {
+        $today = Carbon::now()->format('Ymd');
+
+        // Get last purchase today for this restaurant
+        $lastPurchase = Purchase::where('restaurant_id', $restaurantId)
+            ->whereDate('created_at', Carbon::today())
+            ->lockForUpdate() // prevent concurrency issues
+            ->orderBy('id', 'desc')
+            ->first();
+
+        $lastIncrement = 0;
+
+        if ($lastPurchase && preg_match('/PUR-\d{8}-\d+-([\d]+)/', $lastPurchase->invoice_no, $matches)) {
+            $lastIncrement = (int) $matches[1];
+        }
+
+        $newIncrement = $lastIncrement + 1;
+
+        return "PUR-{$today}-{$restaurantId}-".str_pad($newIncrement, 4, '0', STR_PAD_LEFT);
+    }
+}