Add getGRSerial method to PdfController for retrieving serial numbers by GR number and plant code with authorization

app/Http/Controllers/PdfController.php

@@ -2,9 +2,12 @@
 
 namespace App\Http\Controllers;
 
+use App\Models\GrMaster;
+use App\Models\Plant;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Response;
 use Illuminate\Support\Facades\Storage;
+use Str;
 
 class PdfController extends Controller
 {
@@ -117,6 +120,92 @@ class PdfController extends Controller
 
     }
 
+    public function getGRSerial(Request $request)
+    {
+        $expectedUser = env('API_AUTH_USER');
+        $expectedPw   = env('API_AUTH_PW');
+        $header_auth  = $request->header('Authorization');
+        $expectedToken = $expectedUser . ':' . $expectedPw;
+
+        if ("Bearer " . $expectedToken != $header_auth)
+        {
+            return response()->json([
+                'status_code' => 'ERROR',
+                'status_description' => 'Invalid authorization token!'
+            ], 403);
+        }
+
+        $plantCode  = $request->header('plant-code');
+
+        $grNumber = $request->header('gr-number');
+
+
+        if (!$plantCode) {
+            return response()->json([
+                'status_code' => 'ERROR',
+                'status_description' => "Plant Code value can't be empty"
+            ], 404);
+        }
+        else if (!$grNumber)
+        {
+             return response()->json([
+                'status_code' => 'ERROR',
+                'status_description' => 'GR Number is cannot be empty!'
+            ], 403);
+        }
+
+        $plant = Plant::where('code', $plantCode)->first();
+        $plantId = $plant->id;
+
+        if (!$plant) {
+            return response()->json([
+                'status_code' => 'ERROR',
+                'status_description' => "Plant Code '{$plantCode}' not found!"
+            ], 404);
+        }
+
+        $grExist = GRMaster::where('gr_number', $grNumber)->first();
+
+        if (!$grExist) {
+            return response()->json([
+                'status_code' => 'ERROR',
+                'status_description' => 'GR Number not found'
+            ], 404);
+        }
+
+        $grExists = GRMaster::where('plant_id', $plantId)
+             ->where('gr_number', $grNumber)
+             ->first();
+
+        if (!$grExists) {
+            return response()->json([
+                'status_code' => 'ERROR',
+                'status_description' => 'GR Number not found for this plant!'
+            ], 404);
+        }
+
+
+        $serialNumbers = GrMaster::where('plant_id', $plantId)
+                            ->where('gr_number', $grNumber)
+                            ->pluck('serial_number')
+                            ->toArray();
+
+        if (empty($serialNumbers)) {
+            return response()->json([
+                'status_code' => 'ERROR',
+                'status_description' => 'No serial numbers found for the given GR number!'
+            ], 404);
+        }
+
+        return response()->json([
+            'status_code' => 'SUCCESS',
+            'serial_numbers' => $serialNumbers
+        ], 200);
+
+
+    }
+
+
     /**
      * Display the specified resource.
      */