chore: update document approval workflow and bug fixes

Modules/MaterialLogistics/app/Services/DocumentNumberService.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Modules\MaterialLogistics\Services;
+
+use Modules\MaterialLogistics\Models\MaterialRequisition;
+use Modules\MaterialLogistics\Models\PurchaseOrder;
+
+class DocumentNumberService
+{
+    public function nextMrNumber(): string
+    {
+        $year = now()->format('Y');
+        $prefix = "MR-{$year}-";
+
+        $last = MaterialRequisition::where('document_number', 'like', "{$prefix}%")
+            ->orderByDesc('document_number')
+            ->value('document_number');
+
+        $nextSeq = 1;
+        if ($last) {
+            $seq = (int) str_replace($prefix, '', $last);
+            $nextSeq = $seq + 1;
+        }
+
+        return $prefix . str_pad($nextSeq, 4, '0', STR_PAD_LEFT);
+    }
+
+    public function nextPoNumber(): string
+    {
+        $year = now()->format('Y');
+        $prefix = "PO-{$year}-";
+
+        $last = PurchaseOrder::where('document_number', 'like', "{$prefix}%")
+            ->orderByDesc('document_number')
+            ->value('document_number');
+
+        $nextSeq = 1;
+        if ($last) {
+            $seq = (int) str_replace($prefix, '', $last);
+            $nextSeq = $seq + 1;
+        }
+
+        return $prefix . str_pad($nextSeq, 4, '0', STR_PAD_LEFT);
+    }
+}