Added gr master validation logic for import

app/Filament/Imports/GrMasterImporter.php

@@ -6,6 +6,11 @@ use App\Models\GrMaster;
 use Filament\Actions\Imports\ImportColumn;
 use Filament\Actions\Imports\Importer;
 use Filament\Actions\Imports\Models\Import;
+use App\Models\Plant;
+use App\Models\Item;
+use Str;
+use Filament\Actions\Imports\Exceptions\RowImportFailedException;
+use App\Models\User;
 
 class GrMasterImporter extends Importer
 {
@@ -57,7 +62,58 @@ class GrMasterImporter extends Importer
         //     'email' => $this->data['email'],
         // ]);
 
-        return new GrMaster();
+        $warnMsg = [];
+
+        $plant = Plant::where('name', $this->data['plant'])->first();
+
+        if (!$plant) {
+            $warnMsg[] = "Plant not found";
+        }
+
+        $item = null;
+        if ($plant) {
+            $item = Item::where('code', $this->data['item'])->where('plant_id', $plant->id)->first();
+        }
+        if (!$item) {
+            $warnMsg[] = "Item not found";
+        }
+        if (Str::length($this->data['serial_number']) < 9 || !ctype_alnum($this->data['serial_number'])) {
+            $warnMsg[] = "Invalid serial number found";
+        }
+
+        if (empty($this->data['gr_number'])) {
+            $warnMsg[] = "GR Number cannot be empty.";
+        }
+
+        $user = User::where('name', $this->data['created_by'])->first();
+        if (!$user) {
+            $warnMsg[] = "User not found";
+        }
+
+        if (!empty($warnMsg)) {
+            throw new RowImportFailedException(implode(', ', $warnMsg));
+        }
+        else { //if (empty($warnMsg))
+            $grMaster = GrMaster::where('plant_id', $plant->id)
+            ->where('serial_number', $this->data['serial_number'])
+            ->latest()
+            ->first();
+
+            if ($grMaster) {
+                throw new RowImportFailedException("Serial number already exist!");
+            }
+        }
+
+        GrMaster::updateOrCreate([
+            'plant_id' => $plant->id,
+            'item_id' => $item->id,
+            'serial_number' => $this->data['serial_number'],
+            'gr_number' => $this->data['gr_number'] ?? null,
+            'created_by' => $this->data['created_by'],
+        ]);
+
+        return null;
+        //return new GrMaster();
     }
 
     public static function getCompletedNotificationBody(Import $import): string